The holidays came with a side of flu for many Americans, with 40 states reporting high or very high levels of illness last week, according to the latest government health data. “A lot of flu out there,” said Carrie Reed of the Centers for Disease Control and Prevention. Of course, there are a number of bugs that cause fever, cough, sore throat and other flulike symptoms. One is COVID-19. Another is RSV, or respiratory syncytial virus, which is a common cause of coldlike symptoms but can be dangerous for infants and the elderly. Reed said that the most recent CDC