Male children born to mothers pregnant during the 1918 flu pandemic were shorter and had increased incidence of schizophrenia and autism-like conditions.

“the male children uh that were uh in utero during the winter of 1918 during the pandemic flu are on average a millimeter or two shorter you might say a millimeter or two that's nothing but in a huge statistical sample of millions of people that's enormously significant more interesting is that the incidence of schizophrenia went up about fourfold from about 1% to about 4% and even though autism wasn't a term in 1918 yet uh I don't think came along later what we now retrospectively would call autism also went up by about four-fold”