CityWatch: CDC confirms that coronavirus already spreading in New York City when European travel ban went into effect in March No Comments Uncategorized CDC researchers analyzed the genetic code of virus samples and traced early cases back to Europe. CDC researchers analyzed the genetic code of virus samples and traced early cases back to Europe. 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)