A study published in Nature earlier this week found that people infected with the coronavirus retain relevant immune responses a year later, regardless of whether they were vaccinated. However, those who were vaccinated had stronger responses. Yes, but: We don't know how long immunity lasts. Just as vaccinated people may eventually need a vaccine booster to strengthen their immune response, people with previous infections can benefit from getting at least one shot. “One dose of the mRNA vaccines boosts your antibody response right up," said John Moore, a professor and virologist at Cornell. "So natural infections, those give you a degree of protection, but it’s boosted — in a highly relevant way — by vaccination.”