3 ms·
Except that current strains can't be traced back to the 1918 strain - they are separate strains, not descendants. We don't really know why the 1918 strain disap
by somewhereoutth 2y ago
Except that current strains can't be traced back to the 1918 strain - they are separate strains, not descendants. We don't really know why the 1918 strain disappeared.