Florida Surgeon General Scott Rivkees said Florida will participate in a COVID-19 vaccine pilot program with the federal government. Rivkees said Florida was one of four states chosen to participate, along with the city of Philadelphia. Public health experts believe at least 70 percent of the population must be vaccinated to achieve herd immunity, with officials fearing that demand will outpace supply. Minnesota, California and North Dakota are the other states participating in the pilot program.