Vaccine hesitancy and other obstacles to COVID-19 control: lessons from smallpox.

The world confronts today a disease which was unknown as recently as early 2019. Now that there is a safe and effective vaccine against COVID-19, lessons can usefully be drawn from previous well documented vaccination efforts. Of these, the best documented and most successful is the Smallpox Eradication Program (SEP). A review was made of publications by major players in smallpox eradication, respecting the important differences between the disease, this review revealed several points of connection. Cultural factors loomed large both in the eradication of smallpox and progress, to date, in the control of COVID-19. Other points of similarity included political commitment, the set-up of strong surveillance mechanisms, and assurance of uniformly high quality vaccines tested and approved by the World Health Organization. The future of COVID-19 control depends, in part, on lessons learned from previous vaccination efforts. A review of those efforts will avoid repetition of past errors and permit adoption of best practices from the past. Such analyses must, of course, respect the important differences between COVID-19 and smallpox.