Lori Balter, of Davie, said 10 days after she received her COVID booster, she gathered with her family. One by one they each came down with symptoms and tested positive. She had a few hours of fever, a few days of sinus congestion and about 10 days on and off of a headache. “I feel grateful I had the booster because I know people who weren’t vaccinated that got it more severe and far longer than I did,” Balter said.