The pandemic accelerated economic disparity, revealing a disturbing acceptance of mass death. Did we learn nothing?
A century ago, measles was killing a thousand people in the U.S. every year. By 2000, vaccines had all but eliminated the ...
Five years after the World Health Organization declared a global pandemic, there has been progress — and backsliding in the ...
SARS-CoV-2 has been evolving the ability to evade the immune system about twice as fast as the fastest-evolving flu virus. It averages more than a dozen significant changes every year.