6 ms·
also known as the antigenic sin https://en.m.wikipedia.org/wiki/Original_antigenic_sin https://en.m.wikipedia.org/wiki/Original_antigenic_sin
by rightiousrob 5y ago
also known as the antigenic sin
https://en.m.wikipedia.org/wiki/Original_antigenic_sin https://en.m.wikipedia.org/wiki/Original_antigenic_sin