The Conversation: Polio immunization in the 1950s offers clues of how coronavirus vaccines might be rolled out No Comments Uncategorized Lessons learned in medical history are worth considering as the race to develop Covid-19 vaccines proceeds. Lessons learned in medical history are worth considering as the race to develop Covid-19 vaccines proceeds. 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)