Leading vaccine developers are sizing up the market for booster shots. Meanwhile, researchers are still waiting to find out how long initial vaccine protection lasts.
Doctors and drug companies disagree about when we'll need COVID-19 booster shots
The next vaccine race is underway — this time for booster shots. These shots may not be medically necessary for another one to five years, disease experts wager. But pharmaceutical companies are prepping to distribute boosters to the US before the end of 2021. It all depends on the big question: just how long will vaccine protection last?