Add Yahoo as a preferred source to see more of our stories on Google. A highly contagious new strain of COVID-19 has been detected in California and in other states, a discovery that comes as federal ...

Like the insect, the Cicada COVID-19 variant has shown a pattern of disappearing and reappearing months later.

Strictly speaking, viruses are not living organisms. They do, however, benefit from natural selection over time. The longer a virus exists within a community the more sophisticated its pathogenesis ...

NB.1.8.1, also known as Nimbus, is the new COVID-19 variant that’s been responsible for a surge in cases in Asia. "There’s a new variant that’s actually spreading worldwide,” said Dr. Jill Roberts, ...

A COVID-19 variant is buzzing back to life after years of flying under the radar. Nicknamed “Cicada” for its long hibernation period and noisy return, the strain is now fueling a steady rise in cases ...

A highly contagious new strain of COVID-19 has been detected in California and in other states, a discovery that comes as federal officials announced they will no longer support booster shots for ...