Antigen
4:58
YouTubeHussain Biology
Antigen
An antigen (Ag) is a molecule or molecular structure, such as may be present at the outside of a pathogen, that can be bound to by an antigen-specific antibody (Ab) or B cell antigen receptor (BCR). The presence of antigens in the body normally triggers an immune response. The term "antigen" originally described a structural molecule that binds ...
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Flu, COVID and norovirus cases rise as holiday gatherings wind down
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In a major departure from past practice, the CDC is scaling back the number of recommended vaccines for children. The new schedule recommends that flu and COVID-19 vaccines only be given after consulting with a health care provider. It also narrows recommendations for hepatitis A and B, RSV, and bacterial meningitis to what it considers higher-risk groups. The decision aligns the U.S. more closely with Denmark and Japan, something that HHS Secretary Robert F. Kennedy Jr. has long wanted. The new
8:27
In a major departure from past practice, the CDC is scaling back the number of recommended vaccines for children. The new schedule recommends that flu and COVID-19 vaccines only be given after consulting with a health care provider. It also narrows recommendations for hepatitis A and B, RSV, and bacterial meningitis to what it considers higher-risk groups. The decision aligns the U.S. more closely with Denmark and Japan, something that HHS Secretary Robert F. Kennedy Jr. has long wanted. The new
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