After the Omicron variant caused massive numbers of infections this past winter, lots of people looked on the bright side, hoping it would be “a free shot for the country,” says Eli Rosenberg, deputy director for science at the New York State Department of Health’s Office of Public Health. Even though lots of people got infected with the highly contagious variant, at least they would then have immunity against the virus, protecting them from getting sick in the future. In theory.