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Northern Hemisphere recommended strains. The following is a list of WHO recommended strains for the Northern Hemisphere influenza season. Starting in the 2012–2013 season, the recommendation shifted to include the composition of a quadrivalent influenza vaccine (QIV) that contains both influenza B lineages, alongside a trivalent influenza vaccine (TIV) containing one influenza B lineage.
The live attenuated influenza vaccine is recommended only for people 2–49 years of age, and people who have a weakened immune system, pregnant women, and people with certain chronic diseases may not be eligible to receive live attenuated influenza vaccine. [17] In contrast, inactivated virus vaccines contain no living virus, and cannot cause ...
Influenza vaccines, colloquially known as flu shots, are vaccines that protect against infection by influenza viruses. [13] [14] New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes. [13] While their effectiveness varies from year to year, most provide modest to high protection against influenza.
Vaccine manufacturers are on track to deliver 194 to 198 million doses for the 2020-2021 flu season, about 30 million more than last year, according to the Centers for Disease Control and ...
Here's what you need to know about getting flu, COVID and RSV vaccines this fall. (Photo Illustration: Yahoo News; photos: Getty Images)
The vaccine produces a greater immune response than standard vaccine. According to the CDC, "a study published in the New England Journal of Medicine [in August, 2014] indicated that the high-dose vaccine was 24.2% more effective in preventing flu in adults 65 years of age and older relative to a standard-dose vaccine." The CDC recommends the ...
A spokeswoman for CSL, which has contracts for pandemic influenza vaccines with 30 governments, said the company has been in talks with several governments about procuring vaccines since 2022.
According to the U.S. Department of Health, a growing number of large companies provide their employees with seasonal flu shots, either at a small cost to the employee or as a free service. [21] The annually updated trivalent influenza vaccine consists of hemagglutinin (HA) surface glycoprotein components from influenza H3N2 , H1N1 , and B ...
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