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Omicron has quickly supplanted Delta to become the dominant variant in the United States after spreading widely in South Africa, the United Kingdom, and other parts of the world.

In the past couple of weeks, Covid cases have set records in the U.S. — reaching almost triple the number of…

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Covid has changed the world as we know it, and virulent variants such as Delta have upended early hopes of a clearer-cut “back to normal.” Unfortunately, achieving herd immunity may now be an impossible dream, but we can limit death and disruption as we get to a new normal.

Although…

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It’s impossible to predict with certainty how Covid will affect you if you get infected. Many Covid survivors fully recover within weeks of the onset of their illness, but for others, symptoms linger. Early in the pandemic, it became clear that many people infected with Covid continue to suffer from…

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As predicted and feared, viral variants are now causing many of the new cases of Covid disease in much of the world. The Delta variant (B.1.617.2), which appears to have spread widely in India starting last October, appears to be extremely transmissible and might cause more severe illness. …

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After receiving a Covid-19 vaccine, many people may experience minor adverse effects such as fatigue or headaches, which generally last around 24 to 48 hours. These reactions can be a sign that the immune system is working and responding to the vaccine. But what does this say about (or to)…

Photo: Mick Haupt via Unsplash

Almost 150 million doses of Covid vaccine have been administered in the United States. Most adults are now at least partially vaccinated, and more and more people are choosing to get vaccinated every day. But some people may be wondering if their second shot is necessary. The answer is yes.

Dr. Tom Frieden

President and CEO, Resolve to Save Lives | Former CDC Director and NYC Health Commissioner | Focused on saving lives. twitter.com/drtomfrieden

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