What is the deadliest strain of flu?

How many strains of the flu are there 2020?

There are four main strains of influenza virus: A, B, C, and D. Influenza A and B viruses cause the flu season each year. Flu virus strains are always changing, and so does the yearly flu vaccine as a result.

How long did the 1968 flu pandemic last?

1968 flu pandemic, also called Hong Kong flu pandemic of 1968 or Hong Kong flu of 1968, global outbreak of influenza that originated in China in July 1968 and lasted until 1969–70.

What does H1N1 stand for?

by the third week of April it was established that the illness resulted from a triple recombination of human, avian, and swine influenza viruses; the virus has been found to be H1N1.—

What strains are in the 2020-2021 flu vaccine?

For 2020-2021, cell- or recombinant-based vaccines are recommended to contain:

• A/Hawaii/70/2019 (H1N1)pdm09-like virus (updated)
• A/Hong Kong/45/2019 (H3N2)-like virus (updated)
• B/Washington/02/2019 (B/Victoria lineage)-like virus (updated)
• B/Phuket/3073/2013-like (Yamagata lineage) virus.

What flu was in the 70s?

1970s. An H1N1 (swine flu) outbreak among recruits at Fort Dix leads to a vaccination program to prevent a pandemic.

Was there a flu epidemic in 1974?

1974-1975 (September 1974 through August 1975): From November 1974 through April 1975, influenza reached epidemic proportions in all regions of the United States except the East North Central states. The first confirmed outbreaks were reported in Hawaii in early November.

What was FLU 1957?

In February 1957, a new influenza A (H2N2) virus emerged in East Asia, triggering a pandemic (“Asian Flu”). This H2N2 virus was comprised of three different genes from an H2N2 virus that originated from an avian influenza A virus, including the H2 hemagglutinin and the N2 neuraminidase genes.