delta and omicron. Delta, which became dominant in the U.S. in June 2021, raised a lot of concerns because it was twice as likely to lead to hospitalization as the first version of the virus.

Discovery Health, a major health provider there, calculated adults infected early in the Omicron outbreak were roughly 30% less likely to be admitted to hospital than those infected in South ...

As South Korea battled a spike in flu cases, misinformation swirled online that the country was suffering a resurgence of the ...

The study recorded 30,071 community-onset and 2,075 hospital-onset respiratory viral infections. During the pre-omicron phase with universal precautions, the mean weekly ratio of hospital-onset to ...

The mRNA-1273.815 vaccine provided significant protection against COVID-19-related hospitalizations and medically attended COVID-19 among US adults.

Paxlovid use was associated with lower rates of hospitalization and death, particularly among older adults, a new study finds ...

Scientists named these variants after Greek letters: alpha, beta, gamma, delta and omicron. Delta, which became dominant in the U.S. in June 2021, raised a lot of concerns because it was twice as ...