Healthcare workers administer Pfizer-BioNTech Covid-19 vaccines at a vaccination site inside a church in the Bronx borough of New York, on Friday, Feb. 5, 2021.Angus Mordant | Bloomberg | Getty ImagesPresident Joe Biden won’t commit to achieving herd immunity to the coronavirus in the U.S. by the end of summer, suggesting a long road ahead to defeating the deadly virus.”The idea that this can be done and we can get to herd immunity much before the end of this summer is very difficult,” the Democrat said in an interview broadcast on CBS on Sunday ahead of the Super Bowl.The comment …
