What are the 3 strains that were put in this years flu shot?
What are the 3 strains that were put in this years flu shot?
The trivalent vaccine protects against three different flu viruses: the two most common A strains (H1N1 and H3N2) and one B strain (either Massachusetts or Brisbane), whichever is predicted to affect citizens most strongly in a given year.
What strain of flu is covered in vaccine?
Most flu vaccines in the United States protect against four different flu viruses (“quadrivalent”); an influenza A (H1N1) virus, an influenza A (H3N2) virus, and two influenza B viruses.
What are the four strains of the flu vaccine?
The egg-based quadrivalent influenza vaccines contain the following four viral strains:
- an A/Victoria/2570/2019 (H1N1)pdm09-like virus;
- an A/Hong Kong/2671/2019 (H3N2)-like virus;
- a B/Washington/02/2019 (B/Victoria lineage)-like virus; and.
- a B/Phuket/3073/2013 (B/Yamagata lineage)-like virus.
How many died from the flu in 2012?
The overall burden of influenza for the 2012-2013 season was an estimated 34 million influenza illnesses, 16 million influenza-associated medical visits, 571,000 influenza-related hospitalizations, and 43,000 flu-associated deaths (Estimated Influenza Disease Burden, by Season — United States, 2010-11 through 2017-18 …
How many different flu strains are there?
According to the Centers for Disease Control and Prevention (CDC), there are four types of flu viruses: influenza A, B, C, and D. The seasonal flu viruses that humans face every winter season in the United States are caused by human influenza A.
What strains does the flu shot cover 2020?
For 2020-2021, cell- or recombinant-based vaccines are recommended to contain: A/Hawaii/70/2019 (H1N1)pdm09-like virus (updated)…Flu Vaccine
- A/Guangdong-Maonan/SWL1536/2019 (H1N1)pdm09-like virus (updated)
- A/Hong Kong/2671/2019 (H3N2)-like virus (updated)
- B/Washington/02/2019 (B/Victoria lineage)-like virus (updated)
What is Type C flu?
Influenza C viruses are known to infect humans and pigs. Flu due to the Type C species is rare compared to Types B or A, but can be severe and can cause local epidemics. Type C has 7 RNA segments and encodes 9 proteins, while Types A and B have 8 RNA segments and encode at least 10 proteins.
When is flu B most contagious?
When Flu Spreads People with flu are most contagious in the first three to four days after their illness begins. Most healthy adults may be able to infect others beginning 1 day before symptoms develop and up to 5 to 7 days after becoming sick.