vaccination and previous infection, and better tests, treatments and disease surveillance." Two years ago, Covid hospitalized and killed a higher proportion of people it infected.
Nearly all people who tested positive in hospitals were there because the virus was making them sick—after all, there was NO immunity to it, and, also, the virus was more lethal than Omicron, he tweeted.We’re in a much different place now than two years ago.
Now, the virus is more contagious but less virulent, we have a wall of immunity from vaccination and previous infection, and better tests, treatments and disease surveillance.
2/ With 90% of Americans likely have some level of immunity to Covid—from vaccinations, prior infection, or both. “The virus itself has evolved, becoming more contagious (Alpha), more contagious AND more virulent (Delta) and MUCH more contagious but less virulent (Omicron).