https://www.scientificamerican.com/article/7-ways-to-reduce-reluctance-to-take-covid-vaccines/ > Like billions of people around the world, I am eagerly awaiting my turn for a COVID vaccine. But not everyone shares my enthusiasm. My sister-in-law, an alternative health practitioner, says she doesn't trust “Big Pharma” to have formulated safe shots. She prefers to fortify her immune system with supplements and a healthy lifestyle. “I avoid all vaccines,” she told me. > She is not alone. By now the term “vaccine hesitancy” has entered everyday pandemic discourse, joining “flatten the curve” and “social distancing.” Polls in December 2020 suggested that about 30 percent of Americans harbor doubts about COVID vaccinations. If that number holds steady, unvaccinated people could form a deadly reservoir of the SARS-CoV-2 virus, able to restart outbreaks. We need a level of protection known as herd immunity, which experts estimate will require between 60 and 90 percent of the population to be vaccinated or have antibodies resulting from infection.