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by CryptoPunk
2169 days ago
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To expand on your first point, the circumstances of World War 1 led to carriers of the asymptomatic strains of H1N1 staying in place, in trenches, where the strains extinguished themselves for lack of hosts to spread to. Carriers of the more symptomatic strains were transported to military hospitals which acted as conduits of transmission. The result was the virus progressively evolving to become more deadly. The first wave of the Spanish flu had a fatality rate that is typical of the flu, with deaths preponderantly amongst the elderly, which again is typical. The second wave was massively more deadly, and killed the young in large numbers. Source: https://en.wikipedia.org/wiki/Spanish_flu#Transmission_and_m... |
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