This is when people with COVID-19 are at their most contagious No Comments Uncategorized The actual number of coronavirus cases worldwide is likely far higher than 21 million, scientists say. The actual number of coronavirus cases worldwide is likely far higher than 21 million, scientists say. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to print (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on WhatsApp (Opens in new window)