Multiple choice general knowledge

When was the classical swine flu virus (an influenza type A H1N1 virus) first isolated from a pig?

  1. 1930

  2. 1940

  3. 2009

  4. none of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The classical swine flu (H1N1 influenza A) virus was first isolated from pigs in 1930. While the 2009 H1N1 pandemic was commonly called 'swine flu,' the original virus was identified much earlier in pigs, making 1930 the correct answer.