Excellent stuff to read - the flu pandemics which came from mutated strains originating in Asia in 1957 and 1968 had much higher % death rates, especially when compared to the global population at the time. Also, a lot of younger people died back then, which is not the case today. No media hysteria, no fearmongering, no lockdowns. Took the population between 1 and 3 years to fully self-immunize against the viruses, as the first two waves attacked the unprepared immune systems by storm, but then faded out.