4 ms·
The Spanish flu strain (H1N1) circulated as the common flu until 1957 when it was replaced by Asian flu in 1957 (H2N2). However, it reappeared briefly as the R
by hesk 6y ago
The Spanish flu strain (H1N1) circulated as the common flu until 1957 when it was replaced by Asian flu in 1957 (H2N2). However, it reappeared briefly as the Russian flu in 1977.
- dragontamer 6y agoAnd then reappeared as Swine flu in 2009.