Rare 'Breakthrough' COVID Cases Causing Alarm

Health

Newsmax 21 July, 2021 - 04:46pm 24 views

Reports of athletes, lawmakers and others getting the coronavirus despite vaccination may sound alarming but top health experts point to overwhelming evidence that the shots are doing exactly what they are supposed to: dramatically reducing severe illness and death.

The best indicator: U.S. hospitalizations and deaths are nearly all among the unvaccinated, and real-world data from Britain and Israel support that protection against the worst cases remains strong. What scientists call “breakthrough” infections in people who are fully vaccinated make up a small fraction of cases.

“When you hear about a breakthrough infection, that doesn’t necessarily mean the vaccine is failing,” Dr. Anthony Fauci, the U.S. government’s top infectious disease specialist, told a worried Senate panel this week. The shots are holding up, he said, even in the face of the highly contagious delta variant that is burning through unvaccinated communities

Health authorities have warned that even though the COVID-19 vaccines are incredibly effective — the Pfizer and Moderna ones about 95% against symptomatic infection in studies — they’re not perfect. No vaccine is.

But it wasn’t until delta variant began spreading that the risk of breakthroughs started getting much public attention. The barrage of headlines is disconcerting for vaccinated people wondering how to balance getting back to normal with more exposure to unvaccinated strangers — especially if they have vulnerable family members, such as children too young to qualify for the shots.

Sports fans are seeing daily reports about infected athletes, from the New York Yankees to the Summer Olympics. With the Games soon to start, Kara Eaker, a member of the U.S. women’s gymnastic team who said she was vaccinated, tested positive in a training camp just outside Tokyo. WNBA player Katie Lou Samuelson pulled out of the Olympics and the 3-on-3 basketball competition after testing positive despite being vaccinated.

And politicians in the nation’s capital are being rattled by reports of breakthrough cases, including from a congressman, Florida Republican Vern Buchanan; some Texas Democratic lawmakers visiting Washington as a political protest; at least two people in the White House and several congressional staff members.

White House press secretary Jen Psaki said Wednesday that with 2,000 people on the White House campus each day some breakthrough cases are inevitable, but that the administration will release information if doctors determine any staffer had close contact with the president, vice president or their spouses.

One critical question about breakthrough cases is whether the person actually had symptoms, Dr. Francis Collins, director of the National Institutes of Health, told The Associated Press. “Or is this somebody just being sampled out of an abundance of caution because they had to go into some place like the Congress?” he added.

Indeed, the U.S. Centers for Disease Control and Prevention has said for months that vaccinated people don’t even need to get tested after a virus exposure unless they develop symptoms. The agency cites limited evidence that they’re less likely to infect others than unvaccinated people who get an asymptomatic infection.

But different places have different rules. In Britain, Prime Minister Boris Johnson — who survived COVID-19 early in the pandemic and now is fully vaccinated — began quarantining over the weekend after contact with someone experiencing mild symptoms from a breakthrough infection.

And rigorous testing is required as thousands of athletes, coaches, officials and media — not all of whom are vaccinated — descend on Tokyo for the pandemic-delayed Olympics.

While there’s not a specific count, it’s clear breakthrough infections are rare. As of July 12, the CDC had tallied 5,492 vaccinated people who were hospitalized or died and also tested positive for coronavirus — out of more than 159 million fully vaccinated Americans. CDC Director Dr. Rochelle Walensky has said 99.5% of all deaths from COVID-19 are in the unvaccinated.

There isn’t a separate count of mild or asymptomatic breakthroughs, although CDC is tracking those through studies such as one that gives weekly virus tests to more than 5,000 essential workers, she told senators.

Breakthroughs tend to be mild because a vaccinated person’s immune system doesn’t have to start from scratch to fight the coronavirus. Even if the virus sneaks past vaccine-spurred antibodies and starts replicating in your nose or throat, secondary defenses jump into action and usually, “the virus is stopped in its tracks within a few days,” said University of Pennsylvania immunologist Scott Hensley.

There are caveats. The vaccines don’t work as well in people with severely weak immune systems, such as organ transplant recipients.

And the government is watching closely for signs that breakthrough cases, especially serious ones, are rising, because that might signal the need for booster vaccinations.

But meanwhile White House officials want to “normalize” the concept of breakthrough infections for the public, because they’re worried that these rare, inevitable events could play into the misinformation wars that have helped to keep millions from rolling up their sleeves.

“The vaccines were developed to keep us out of those terrible institutions we call hospitals,” said Dr. William Schaffner, an infectious disease expert at Vanderbilt University. “We have to keep coming back to that.”

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What to do if you're exposed to COVID-19 after being fully vaccinated, according to experts

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You both got vaccinated months ago, yet every time you hear a cough from the next room, you can't help but wonder if you should get tested for COVID.

Most public health experts would say you're in the clear — probably not sick and probably not infectious — unless you start to feel symptoms. (Your ailing roommate, however, should get tested.)

Although the COVID-19 vaccines are highly effective at preventing severe illness, "breakthrough" infections are occurring in fully vaccinated people. It might feel like a bad cold, or carry no symptoms at all.

The Delta variant has increased the odds of such an infection, but there are plenty of other viruses going around, Amesh Adalja, senior scholar at Johns Hopkins Center for Health Security, told Insider. 

The only way to know for sure is to get tested. But if your roommate's test comes back positive for COVID-19, what do you do?

If you develop a cough, congestion, or a loss of taste and smell after a known exposure, you should get tested regardless of your vaccination status.

Start with a rapid antigen test. In studies, rapid tests were about 72% effective at identifying COVID-19 in symptomatic people and correctly ruled out COVID for about 99.5% of people who had symptoms for other reasons.

You can also take a rapid test at home. They're more accurate if you get tested every few days, so if you're initially negative, you might want to test again to be sure. You could also follow up with a PCR test that looks for other viruses as well, Adalja added.

"You also have to remember that now that many people are socially interacting, other viruses have come back — things like rhinovirus and seasonal coronaviruses — so there are other causes of cold-like symptoms," Adalja said.

The CDC recommend vaccinated people get tested or quarantine only if they have symptoms of COVID-19.

If you're symptom-free for more than a week after an exposure, you can relax, according to Paul Offit, director of the Vaccine Education Center at Children's Hospital of Philadelphia.

"The only time you should get tested if you're fully vaccinated is if you're symptomatic, no matter what the exposure," Adalja said. 

Charity Dean, a former top-tier official at the California Department of Public Health, told Insider she was "very disappointed" the CDC is not seriously tracking mild or asymptomatic infections in fully vaccinated people. Without that information, we risk missing a more dangerous "escape variant," Dean told Insider's Hilary Brueck.

So if you're making your decision with public health in mind, you may want to get tested even if you don't have symptoms.

COVID-19 or seasonal virus symptoms indicate that you could be infectious to others.

"If the virus reproduces itself well enough in you to cause symptoms, I think that means that you're likely to be contagious," Offit told Insider.

Vaccinated people who get COVID may be less contagious than unvaccinated infected people, if their reduced viral loads are any indication.

However, other experts recommend using common sense before deferring to CDC guidelines, which "lack nuance," emergency physician Leana Wen told CNN.

"I don't want someone coming into work, who then tells me that they just spent the entire night caring for their spouse who's ill from COVID," Wen told CNN. "Should that person really be in a crowded conference room with a whole bunch of other people? Does that sound right? It doesn't meet the common sense test."

One thing experts generally agree on: stay away from people if you're not feeling well.

The norms of the pandemic — mask-wearing, quarantining — still apply if you're sick and it's not COVID-19. But if you're vaccinated and feeling fine, there's no need to worry, Offit said.

"I think we're going to drive ourselves crazy if we're expecting this vaccine to prevent asymptomatic or mildly symptomatic disease," Offit said. "Just use common sense. If you develop respiratory symptoms, I think it's probably a good idea to wear a mask."

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