In 1889, a mysterious respiratory illness emerged in Russia and then spread across the globe, triggering at least three waves of infection over the course of several years.
A strange pulmonary sickness first appeared in Russia in 1889 and subsequently propagated around the world, causing at least several outbreaks of infectious disease over all of the period of many decades. Numerous experts believe the sickness, called the Russian flu, was triggered by a disease outbreak coronavirus identical to SARS-CoV-2, the viral infection that tends to generate COVID-19.
Some scientists suspect that the Russian flu actually may have been caused by a pandemic coronavirus similar to SARS-CoV-2, the virus that causes COVID-19, The New York Times reported.