Cartoon – Pandemic Forecasts
Category Archives: False Hope
Cartoon – State of the Union
Cartoon – The Maskless Herd
Experts Slam The White House’s ‘Herd Immunity’ Plan
The White House is reportedly embracing a herd-immunity approach focused on “protecting the elderly and the vulnerable” but experts are calling the plan dangerous, “unethical”, and equivalent to “mass murder”.
The news comes following a petition titled The Great Barrington Declaration, which argued against lockdowns and school and business closures and got almost 500,000 signatures – although some of them were fake.
“Current lockdown policies are producing devastating effects on short and long-term public health,” the declaration states, adding, “The most compassionate approach that balances the risks and benefits of reaching herd immunity, is to allow those who are at minimal risk of death to live their lives normally to build up immunity to the virus through natural infection, while better protecting those who are at highest risk. We call this Focused Protection.”
Essentially, herd immunity is when enough people are immune to a disease, like Covid-19, that the disease can’t be transmitted as easily and thus provides indirect protection.
It’s been rumoured that the government has been leaning towards this plan of action for some time now, although this is the first real admission.
In response to today’s news, experts around the world have been voicing their concerns.
And this isn’t the first time we’ve heard experts say herd immunity is not a good idea.
For example, the head of the World Health Organization said Monday that allowing the novel coronavirus to spread in an attempt to reach herd immunity was “simply unethical.”
Similarly, the National Institutes of Health (NIH) director Francis Collins also denounced herd immunity as a viable plan.
“What I worry about with this is it’s being presented as if it’s a major alternative view that’s held by large numbers of experts in the scientific community. That is not true. This is a fringe component of epidemiology. This is not mainstream science. It fits into the political views of certain parts of our confused political establishment,” he said in an interview.
Not to mention studies continue to show that Sweden’s attempts at herd immunity have failed and have resulted in a higher Covid-19 death toll than expected.
As more research comes out, scientists are starting to learn that Covid-19 immunity, even in those who were severely infected, can fade after a few weeks.
This is why we’ve seen cases of reinfection and why many experts are advising against a herd immunity plan.
Currently less than 10% of the population in the U.S. are immune to Covid-19 but for herd immunity to be achieved most experts estimate between 40% to 80% of the population would need to be infected.
To put that into context, that means around 197 million people would need to be infected in America. And assuming that the Covid-19 fatality rate is somewhere between 0.5% and 1%, based on numbers from the World Health Organization (WHO), more than 1 million people would die – at minimum.
William Haseltine, Chair and President of ACCESS Health International, told CNN “herd immunity is another word for mass murder. We are looking at two to six million Americans dead – not just this year but every year.”
“This is an unmitigated disaster for our country – to have people at the highest levels of our government countermanding our best public health officials. We know this epidemic can be put under control. Other countries have done it. We are doing the opposite.”
Cartoon – Pandemic Leadership
The coming vaccine chaos
The first coronavirus vaccine will likely get authorized within months, but that will only be the beginning of what’s likely to be a long, chaotic vaccination process, the New York Times’ Carl Zimmer reports.
The big picture: The first vaccines probably will offer only moderate protection against the virus, meaning we can’t ditch our masks even if we get one. And we probably won’t have a good way to choose between these vaccines once several of them are on the market.
- Some vaccines that are in earlier stages of development today may struggle to cross the finish line, even if they work better than earlier vaccines.
- And some vaccines may be pulled off of the market because they’re unsafe.
Between the lines: Some of this is inherent to the breakneck speed of the vaccination effort, but some of it is a result of how that effort was designed.
- Earlier this year, some government scientists had wanted to test vaccine candidates against each other, instead of testing all of them against a placebo. But these kinds of trials are risky for drug companies, because they show the value of one vaccine against another.
- That information could be useful for patients, but is a business risk for manufacturers.
- “You have to have the total cooperation of the pharmaceutical companies to get involved in a master protocol,” top infectious disease expert Anthony Fauci told NYT. “That — I don’t know what the right word is — didn’t turn out to be feasible.”
The stubbornly high coronavirus death rate
Although other wealthy countries have higher overall coronavirus mortality rates than the United States, the U.S. death rate since May is unrivaled among its peers, according to a new study published in JAMA.
Between the lines: After the first brutal wave of outbreaks, other countries did much better than the U.S. at learning from their mistakes and preventing more of their population from dying.
Why it matters: “If the U.S. had comparable death rates with most high-mortality countries beginning May 10, it would have had 44,210 to 104,177 fewer deaths,” the authors conclude.
- Excess deaths have followed a similar pattern: The hardest-hit European countries had similar or higher rates of excess deaths of all causes to the U.S. early on, but these fell much lower than the America did after the first wave.
Yes, but: Death rates are not static, as this study proves, and outbreaks in several European countries have taken a turn for the worse lately.
Trying to reach herd immunity is ‘unethical’ and unprecedented, WHO head says
The head of the World Health Organization said Monday that allowing the novel coronavirus to spread in an attempt to reach herd immunity was “simply unethical.”
The remark was a sharp rebuke of the approach amid mounting new infections around the world. Recent days have seen the most rapid rise in cases since the pandemic began in March.
“Never in the history of public health has herd immunity been used as a strategy for responding to an outbreak, let alone a pandemic,” WHO Director-General Tedros Adhanom Ghebreyesus said at a Monday media briefing. “It is scientifically and ethically problematic.”
In a public health context, herd immunity typically describes a scenario in which a large enough share of the population is vaccinated against a disease to prevent it from spreading widely, thereby providing default protection to a minority of people who have not been vaccinated.
But as there is still no vaccine for the coronavirus, achieving herd immunity in the current environment would require a large number of people to contract the virus, survive covid-19, and then produce sufficient antibodies to provide long-term protection.
While the scientific community has roundly rejected herd immunity the approach, public interest in it has waxed and waned amid pressure to reopen schools and economies.
Last month, President Trump appeared to praise the idea during a town hall in Pennsylvania.
“You’ll develop herd — like a herd mentality,” he said. “It’s going to be — it’s going to be herd developed — and that’s going to happen.”
British Prime Minister Boris Johnson’s government initially expressed interest in the theory before backtracking amid public outcry over the dangers of letting the virus spread. Johnson himself was hospitalized with a severe case of covid-19, which he said could have killed him.
Tedros, noting that there had been “some discussion” about the concept recently, told reporters Monday that allowing people to be exposed to a deadly virus whose effects are still not fully known was “not an option.”
“Most people who are infected with the virus that causes covid-19 develop an immune response within the first few weeks, but we don’t know how strong or lasting that immune response is, or how it differs for different people,” he said.
Though rare, there are multiple documented instances of people being infected for a second time after recovering from covid-19. An 89-year-old woman in the Netherlands died after being infected with the coronavirus for a second time, Dutch news reported Monday.
Antibody studies suggest that less than 10 percent of people in most countries have contracted covid-19, Tedros said, which is nowhere near the majority that would be needed for herd immunity.
With the “vast majority” of the world’s population susceptible, letting the virus spread “means allowing unnecessary infections, suffering and death,” he said.
Just in the last four days, Tedros said Monday, the global coronavirus count has continued to break its daily record for the number of new confirmed infections.
“Many cities and countries are also reporting an increase in hospitalizations and intensive care bed occupancy,” he added.
Tedros has urged governments to pursue comprehensive plans that include widespread testing, social distancing, and other preventive measures, such as face-mask wearing, alongside a global push to develop a vaccine. The WHO is spearheading an effort to distribute coronavirus vaccines equitably once they are available, which Trump declined to join.
A negative Covid-19 test isn’t an all-clear
https://www.vox.com/science-and-health/21502495/covid-19-testing-false-negative-presymptomatic
What is the probability of testing positive for Covid-19 before you get symptoms? Scientists really don’t know.
Vice President Mike Pence has not tested positive for SARS-CoV-2, the virus that causes Covid-19. But he’s been in close contact, in recent days, with people with confirmed Covid-19 infections. And he debated Sen. Kamala Harris last night. Was this a good idea?
In a word: No. Per the Centers for Disease Control and Prevention’s own guidelines, Pence should have been quarantining, not debating, even if he’s testing negative. (That said, CDC director Robert Redfield had cleared Pence to debate.)
Since the Trump administration’s actions over the last 11 days have muddied the message from public health experts, let’s be clear: A negative test is not an all-clear for doing risky activities during the pandemic.
Scientists don’t yet understand exactly when a person who is infected with the coronavirus will start testing positive for the virus. There are situations when a person could test negative, actually be infected, and also be contagious. It’s also possible — since this virus multiplies itself exponentially in the body very, very quickly — that someone could test negative in the morning (and not be contagious), but by the afternoon test positive (and be very contagious).
Confusing? Yes, it is. But the bottom line is that Covid-19 diagnostic tests (both the slower, more common, viral genetic test — called RT-PCR— and the more rapid viral protein test, called an antigen test) are most useful, and most accurate, when used on people experiencing symptoms.
“One of the huge gaps now in the data is: What is the probability of testing positive before you get symptoms?” Benny Borremans, a disease ecologist at UCLA, says. Right now, scientists just don’t know for sure.
Why testing is less accurate before symptoms begin
There are several reasons scientists are unsure about when in an infection people will start testing positive for SARS-CoV-2. To understand why, and to make this less confusing, it’s helpful to think through all the things that have to happen for a Covid-19 test to come back positive.
First, the virus needs to take its time to establish itself in a person’s body. This is called the incubation period, and it can take upward of two weeks. On average, this happens in about five or six days. During the incubation period, a person might not test positive for the virus because there’s not enough virus in their body to detect in a test.
“The virus particles, day by day, will multiply,” Muge Cevik, a virologist and physician at the University of St. Andrews, says. “The virus needs to reach a threshold for the PCR [i.e. viral genetic] tests to pick it up.” PCR is the more common Covid-19 diagnostic test because it requires a lower threshold of the virus to test positive; rapid antigen tests would require a higher level of virus to register a positive test.
Testing positive should coincide with being contagious. But not always.
Generally, a person can start being infectious for the virus around two days before they start to show symptoms, in what’s known as the presymptomatic phase.
And, generally — but not always — scientists would expect that if a person is contagious, they’d test positive. After all, if they’re spewing enough virus out to get another person sick, they’re probably spewing enough virus out for a diagnostic test to pick up on.
But there are a few wrinkles here: When exactly a person makes the jump from testing negative and being non-infectious to testing positive and being infectious is hard to predict.
“If everything works as it should, the test should be positive if you are infectious at the very moment of the test, as there must be virus present then,” Justin Lessler, an epidemiologist at Johns Hopkins University, says. “However, you could easily test negative then become infectious a day, or even hours, after the test.” Unless you’re testing every hour, it’s impossible to get a fine-grained view on when the infectious period truly begins. (Also possible, but probably rarer: A person tests positive before they start to be contagious.)
Even if a person is contagious, they may not test positive. It could come down to where the sample for testing was taken from.
In general, “we consider the gold standard to be the nasopharyngeal swab,” Bobbi Pritt, the director of clinical microbiology at the Mayo Clinic, says. “That’s the deep nasal swab that goes all the way back into the back of your nose. Whereas other specimens — like a throat swab or just the very outer edge of your nose, like right inside your nostril — that’s not going to contain as much virus.”
Early on in the infection, a person who is incubating the virus is expected to test negative. Over the summer, Johns Hopkins researchers — including Lessler — published a paper estimating the likelihood of a false negative test in the first few days after being exposed to the virus. On the first day, they found the chance of a false negative is near 100 percent. No test is going to find the virus so early. Through the first four days, that rate drops to 67 percent on day four, on average, but with a very large range of error. On the day people first reported symptoms, there’s still a significant false negative rate, at 38 percent.
What does this all add up to? “What we’re saying is don’t test anyone in less than four days after exposure,” Cevik says. It’s not going to tell you much about the person’s status. Or if a person is tested in that time, they ought to be retested a few days later.
“In general, five to eight days after exposure is the best time to test,” Cevik says. “Or day three after symptom onset.” That’s when the genetic RT-PCR tests are most likely to reveal a true positive.
Because nothing about Covid-19 can be simple, here’s another thing to consider: The antigen tests that produce quick results have a shorter window in which you’d expect a person would test positive.
They are also slightly less accurate. But if used correctly, they can be very useful: They’ll test positive in the window when a person is most likely to be contagious. With repeated use, scientists hope these quick tests could help stop outbreaks from growing out of control.
The White House, on the other hand, has been using another rapid test, Abbott’s ID Now, to screen asymptomatic people. We just don’t know how good these tests — or any tests, for that matter — are at screening asymptomatic, or presymptomatic, people. “The FDA would be the first ones to tell you that they don’t know how the test is going to perform in that population,” Pritt says.
A negative test without symptoms might not mean much. Keep your mask on.
Here’s the bottom line: “We don’t know when one will test positive pre-symptom onset for PCR or antigen tests,” epidemiologist A. Marm Kilpatrick writes in an email. If you have symptoms, you’re likely to test positive the day you start feeling ill, but not guaranteed. The first few days after starting to feel sick, you have a very high probability of testing positive.
We could learn more in the months ahead about testing asymptomatic and presymptomatic people with studies following people after they have been exposed to the virus, and testing them repeatedly over a few weeks to determine the likelihood of testing positive before symptoms begin. “We have a lot of data from symptom onset onwards, but we don’t have data in terms of pre-symptoms,” Cevik says.
This is why testing is no replacement for other Covid-19 mitigation measures, like quarantining people exposed to the virus, mask-wearing, and social distancing.
“Testing negative is not like a passport for people to go out and do whatever they want to do,” Cevik says. If you might have been exposed to the coronavirus, like Vice President Pence was, you should quarantine for two weeks, regardless of what your test says.
America’s newest wave of Covid-19 cases, explained
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A new wave of Covid-19 cases is building across the United States, a harbinger of difficult winter months ahead.
America is now averaging nearly 48,000 new confirmed cases every day, the highest numbers since mid-August, according to the Covid Tracking Project. More than 34,500 Americans are currently hospitalized with Covid-19 in the US, up from less than 30,000 a week ago. Nearly 700 new deaths are being reported on average every day, too — and while that is down from August, when there were often more than 1,000 deaths a day, deaths are going to eventually start increasing if cases and hospitalizations continue to rise. It’s a pattern we have seen before.
Public health experts have been warning for months that fall and winter could lead to a spike in Covid-19 cases. Why? Because the best way to slow down the coronavirus’s spread is to keep your distance from other people and, if you are going to be around others, to be outside as much as possible — and both become harder when the weather gets cold.
We may now be seeing those predictions start to come true. The US already has more than 7.7 million confirmed cases and 214,000 deaths. Both numbers will continue to climb.
Eight months into the pandemic, America’s failures to contain Covid-19, and states’ eagerness to reopen even if they haven’t gotten their outbreaks under control, is once again leading to a surge in cases and hospitalizations.
Covid-19 cases are rising everywhere across the country
Earlier in the year, there was limited value to discussing “waves” because some states would have a decline in cases while other states were experiencing surges. What distinguishes this autumn wave is that it seems to be happening everywhere.
Case numbers are up in the Northeast, the Midwest, and the West. The South appears to be, at best, plateauing at a level even higher than that which the Northeast endured during the worst of New York’s outbreak.
What’s so worrisome is that no one state or region can be blamed for this new wave. Just 13 states have seen their number of new Covid-19 cases drop over the last two weeks, according to Covid Exit Strategy. Cases are up in all the others.
Raw case numbers can, of course, obscure important differences in population; 100 new cases means something different for California than it does for Wyoming. Experts will use another metric — new cases per million people — to gauge how saturated a given state is with Covid-19.
The goal would be to have fewer than 40 new cases per million people. But just three states — Maine, Vermont, and New Hampshire — meet that threshold. Meanwhile, North Dakota (627 cases per million), South Dakota (596), Montana (474), and Wisconsin (434) are some of the states seeing very high levels of new infections.
As Vox’s German Lopez reported this week, just one state — Maine — meets all of the benchmarks established by experts for a state to consider its Covid-19 outbreak contained. And yet, most states have reopened many of the businesses that were closed in the spring: 40 or so states have reopened restaurants, bars, gyms, movie theaters, and nonessential retail.
“Part of the problem is America never really suppressed its Covid-19 cases to begin with,” Lopez wrote, explaining why experts were anticipating a new surge in cases. “Think of a disease epidemic like a forest fire: It’s going to be really difficult to contain the virus when there are still flames raging in parts of the forest and small embers practically everywhere. The country always risks a full blaze with each step toward reopening and with each failure to take precautions seriously.”
Too many Covid-19 tests are coming back positive right now
Another closely watched indicator for renewed Covid-19 spread is the percentage of coronavirus tests that come back positive. The number of tests being conducted doesn’t actually tell you all that much; if a high percentage of them are positive, that suggests that many others aren’t being caught at all and the virus could continue to spread unchecked.
So while the US is now averaging nearly 1 million tests every day, that is not quite the triumph it might sound like (or President Donald Trump would like to believe it is). The country’s positive test rate is 5 percent, right at the threshold experts say would reflect adequate testing. Ideally, it would be even lower, 2 percent or less.
But even with that passable national positivity rate, most states are still not conducting nearly enough testing. Here are the 10 states with the highest positive test rates, according to Covid Exit Strategy:
- Idaho (25 percent)
- South Dakota (20.6 percent)
- Wisconsin (19.5 percent)
- Iowa (17.1 percent)
- Kansas (16.1 percent)
- Wyoming (15.5 percent)
- Utah (14.7 percent)
- Nevada (14.4 percent)
- Indiana (13.6 percent)
- Alabama (13.3 percent)
It’s really only a handful of better-performing states — namely, New York, with more than 115,000 tests conducted per day and a 1.2 percent positivity rate — that’s keeping the US’s overall positive test rate from looking a lot worse.
America has never had a cohesive Covid-19 testing strategy. Since February, there have been regular supply shortages delaying test results. States have been fighting each other for precious testing resources. Contact tracing has not been a priority for the federal government, and most states have still not hired nearly enough people to perform that work.
Wealthy countries like Germany and South Korea have used effective test-trace-isolate programs to keep their Covid-19 outbreaks in check. The US, meanwhile, is still struggling to perform enough tests or scale up its contact tracing capabilities. Just 11 states, plus the District of Columbia, could realistically expect to perform adequate contact tracing, according to Covid Exit Strategy, considering their positivity rate.
Without improvement in both of those areas, it will continue to be difficult for the US to contain the coronavirus before a vaccine becomes available.
More Americans are being hospitalized with Covid-19 too
Both case numbers and the positive test rate can be a little deceptive, depending on how many tests are being performed. They suggest what’s happening on the ground — in this case, Covid-19 is spreading — but they do have their limitations. There is some truth to the president’s claim that more tests will mean more cases, though that is not a reason to stop testing.
Hospitalizations, on the other hand, are more concrete. If more people are developing symptoms severe enough to warrant being hospitalized, that is a strong indicator that the real number of people being infected with Covid-19 is growing, regardless of whether they are getting tested.
And after a dip in September, the number of Americans currently in the hospital with Covid-19 is higher than it’s been in a month. That trend has been seen across the country.
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The worry becomes that if hospitals take in too many patients, they’ll have to turn other people away, or that overwhelmed staff and facilities could lead to some patients receiving substandard care. According to Covid Exit Strategy, 20 states currently have reduced ICU capacity that puts them in a danger zone; 21 states have an elevated occupancy rate in their regular hospital beds.
Wisconsin, where the number of hospitalized Covid-19 patients has risen over the last month from about 300 to 876 today, recently established a new field hospital on its state park fairgrounds over fears that the state’s hospitals wouldn’t have enough beds given the recent surge in cases.
Fortunately, hospitals have gotten much better at treating Covid-19. They have proven treatments, like remdesivir and dexamethasone, that reduce the length of hospital stays and reduce mortality in patients with severe symptoms. They have learned techniques like putting patients on their stomach to improve breathing. Hospitals that have endured multiple spikes of Covid-19 cases report patients in the later waves are spending less time in the hospital and dying less frequently.
Nevertheless, more people developing severe symptoms, as we are starting to see, will inevitably lead to more deaths. Over the summer, people wondered why deaths were falling while cases and hospitalizations rose — until deaths did start to increase. There is a long lag between cases rising and deaths rising, because it can take a month or more between when a person first contracts Covid-19 and, if they die, when their death is reported.
That’s why these new Covid-19 trends in the US are so worrisome. Cases are rising, as are hospitalizations. It could be only a matter of time before deaths start to spike as well.
HENRY KOTULA 