“Every year, it’s a big problem,” Dr. Salvatore said, “but this year one of the reasons people are getting worried is because the strain circulating is one of the H3N2 family, a virus that compared to the H1N1 is known to be more severe and less responsive to the vaccine.”

“It’s too late to get the vaccine.” False.

“The flu season can last through April,” Dr. Miao said, “so we are still encouraging people to get it.” Keep in mind it takes about two weeks to become immunized so sooner, better.

“The shot will give me the flu.” False.

“It’s there to train your immune system on how to respond to the flu,” Dr. Miao said of the flu shot, comparing it with the muscle soreness you might feel the day after a strenuous workout. “Sometimes people feel tired and achy afterwards, but it’s because your immune system is going through a training program.”

“New Yorkers are more susceptible to influenza.” True.

In New York City, the virus is transmitted from person to person more easily, Dr. Salvatore said, because of population density and shared public space. “New Yorkers always think they’re tough and there is nothing that can keep New Yorkers home from work or school. But we’re always using public transportation and going to the gym — places where we’re in close contact with people who are sick.”