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We know a lot about Covid-19. Experts have many more questions

We know a lot about Covid-19. Experts have many more questions
A transmission electron micrograph of a SARS-CoV-2 virus particle.
NIAID
Less than a year and a half ago, the world was blissfully, dangerously ignorant of the existence of a coronavirus that would soon turn life on earth on its head.
In the 16 months since the SARS-CoV-2 virus burst into the global consciousness, we’ve learned much about this new health threat. People who contract the virus are infectious before they develop symptoms and are most infectious early in their illness. Getting the public to wear masks, even homemade ones, can reduce transmission. Vaccines can be developed, tested, and put into use within months. As they say, where there’s a will, there’s a way. ....

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Some experts fear next-generation Covid vaccines may be worse

Hyacinth Empinado/STAT
With Covid-19 vaccines, the world hopes to beat back the virus that causes the disease. But some scientists are increasingly concerned that, because of a quirk of our own biology, future iterations of the vaccines might not always be quite as effective as they are today.
The concerns stem from a phenomenon that is known as imprinting, sometimes called original antigenic sin, which is believed to affect how we respond to some pathogens.
In short, when your body is introduced to a particular threat for the first time either through infection or a vaccine that encounter sets your immune system’s definition of that virus and what immune weapons it needs to detect and protect against it in the future. ....

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Is it time for the US to delay second Covid-19 shots?

Is it time for the US to delay second Covid-19 shots?
advisory.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from advisory.com Daily Mail and Mail on Sunday newspapers.

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How to Double the Vaccination Pace

With Covid cases rising, more experts think the U.S. should start delaying second vaccine shots. ....

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Virus variants threaten to draw out the pandemic, scientists say

Virus variants threaten to draw out the pandemic, scientists say
mcall.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from mcall.com Daily Mail and Mail on Sunday newspapers.

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