Dr. Howard Smith Oncall

  Vidcast:  https://youtu.be/81G-oRa44pU   The CoVid19 virus is moderately contagious. The CoVid19 reproductive number, number of vulnerable  persons expected to be infected from a single infected person, is 2 -3.  This number may be as high as nearly 7.  In comparison, the number for measles is 12-18, diphtheria  6-7, HIV 2-5, the flu 2-3 and Ebola 1.5-2.5.     The incubation period is 2-14 days with a 5-6 day average.  The cases in each affected area double every 2 days.  The institution of travel and mass gathering restrictions has had a profound positive impact on the reproductive number and viral spread according to unpublished data on the MedRxiv site.   You can track the spread of CoVid19 around the world and through the US on the excellent Johns Hopkins CVid19 web page:   Johns Hopkins Live Coronavirus Stats: http://coronaviruslivestats.com Reproductive rate of CoVid19: https://www.medrxiv.org/content/10.1101/2020.02.07.20021154v1.full.pdf Incubation period: https://www.medrxiv.org/content/10.1101/20