Influenza C viruses can cause mild respiratory illnesses but not epidemics, and modern flu vaccines do not protect against them. Finally, influenza D viruses primarily affect cattle and are not a problem for humans. The strains recommended for vaccination for the flu season in the northern hemisphere are:. However, flu viruses tend to mutate during flu season, which may alter the effectiveness of the current flu vaccine. Unfortunately, manufacturers are not able to reissue flu vaccines when this happens because of the way flu vaccines are created and produced for human use.
Lee says. Site Search. Staff Mission Contact Us. Influenza Vaccines. Feb 21, Share this page:. Sign up now». Related News All news. Sep 30 Jun 08 No health issues in babies whose moms got flu vaccine while pregnant. The circulating H3N2 strain has multiplied millions of times and in that process mutated to be slightly off target from the vaccine.
The drift may mean that shot may be slightly less effective at preventing infections, but it should still help lessen the severity of disease, Landry told Healthline. In addition, the shot may still do a good job of targeting other A and B strains that are circulating.
Flu cases are increasing across the country, and H3N2 is the dominant strain at the moment. H3N2 strains are known to cause more severe illness in older adults, while B strains are known to have a greater impact on children. The Healthline News team is committed to delivering content that adheres to the highest editorial standards for accuracy, sourcing, and objective analysis. Every news article is thoroughly fact-checked by members of our Integrity Network.
Furthermore, we have a zero-tolerance policy regarding any level of plagiarism or malicious intent from our writers and contributors. All Healthline News articles adhere to the following standards: All referenced studies and research papers must be from reputable and relevant peer-reviewed journals or academic associations.
All studies, quotes, and statistics used in a news article must link to or reference the original source. The article must also clearly indicate why any statistics presented are relevant. All content related to new treatments, drugs, procedures, and so on must clearly describe availability, pricing, side effects, treatment target e. All news articles must include original commentary from at least two qualified sources with appropriate credentials and links to relevant associations or published works.
0コメント