This article from the FDA compares broad U.S. recommendations on Covid vaccination with those from other countries and announces the adoption of an evidence-based approach to such recommendations.

The Japanese technology conglomerate plans to shed underperforming businesses and shift its focus to new areas of growth. By River Akira Davis Reporting from Tokyo The Japanese tech giant ...

In 1958, a new strain of influenza A with different HA and NA was identified and antigenic shift was discovered; the need for a trivalent vaccine was recognized.

Every now and then, the virus changes dramatically in a process called antigenic shift. When this occurs, people become even less immune, and the likelihood of disease spread dramatically increases.

Every now and then, the virus changes dramatically in a process called antigenic shift. When this occurs, people become even less immune, and the likelihood of disease spread dramatically increases.

Every now and then, the virus changes dramatically in a process called antigenic shift. When this occurs, people become even less immune, and the likelihood of disease spread dramatically increases.

In 1968, a shift once again caused a pandemic. In 1976 and 2009 , concerns that the virus had shifted led to [fears that a new pandemic loomed]. But Americans were lucky once again.

In 1968, a shift once again caused a pandemic. In 1976 and 2009 , concerns that the virus had shifted led to fears that a new pandemic loomed. But Americans were lucky once again.

Antigenic shift and Antigenic drift in viruses. Antigenic shift is a process where two or more different strains of a virus combine to create a new subtype of virus. Often, this new viral strain will ...

In 1958, a new strain of influenza A with different HA and NA was identified and antigenic shift was discovered; the need for a trivalent vaccine was recognized.

Antigenic shift is a more abrupt, significant genetic change that occurs when two different influenza viruses combine to create a novel strain. This is where COBRA comes in.