"Osterholm thinks boosting people will help -- but says it's far more important to get more people vac-cinated in the first place. "If we see upticks in L.A. or New York City, we could just as easily find our-selves back to where we were. At this point, there's no evidence of that happening," he said in his podcast this week. "But I must tell you that given the rates of vaccination ... we surely could see major surges in both of those metropolitan areas where with the population density being what it is, could really, truly raise the number of national cases in short order," he added. An estimated 60 million Americans remain unvaccinated. That's plenty of people who can help fuel new surges, Osterholm said. "Overall, there's still a lot of human wood left for this coronavirus forest fire to burn," he said."