In the late 1960s, the Hong Kong flu was allowed to run rampant until a vaccine was introduced
July 13, 2020, will mark 52 years since the first case of Hong Kong flu was reported in the city. That was in 1968, and over the next six months the disease would claim more than one million lives as it spread to Vietnam, Singapore, India, the Philippines and on to Australia, Africa, South America and Europe.
America wasn’t immune either. The virus entered California via troops returning from the Vietnam war, but didn’t become widespread there until December 1968.
Worldwide, the deaths from Hong Kong flu peaked in December 1968 and January 1969.
Named Hong Kong flu because it originated in the then British colony, and known formally as H3N2, the strain infected about 500,000 residents of Hong Kong, or 15 per cent of the population.