Booster shots against COVID-19 are now being offered to people who are eligible. They're a new front in the battle against the novel coronavirus, and you may be wondering who the shots are for, what protection they provide, and what you can expect after getting one. When you get your booster shot, these are five things you should know. Read on to find out more—and to ensure your health and the health of others, don't miss these Sure Signs You May Have Already Had COVID . 1 Research Has Found They're Safe and Effective Right now, Pfizer is the only COVID-19 vaccine that has been authorized for booster shots for people who are over age 65, are in long-term care, are at risk of exposure because of their occupation, or are between 18 and 64 and at increased risk for severe disease. (Moderna and Johnson & Johnson have applied to have boosters authorized as well.) The Food & Drug Administration approved Pfizer booster shots based on data that found it safe