For everything there is a season, and that includes viruses. Whether it’s the common cold or flu viruses, in the U.S. the season begins in fall. By December, the viral spread is in full swing until it peaks in February. However, it’s different in the southern hemisphere where Africa, Australia and Brazil are approaching winter as the U.S. and most of Europe are sliding into spring and summer.
For an understanding of the novel coronavirus (COVID-19) currently spreading across the world, it helps to have some background on the virus that triggers flu. Interestingly influenza viruses and COVID-19 have similar characteristics, including a heat-sensitive lipid layer.