The big difference? There is a flu shot available. Imagine if a strain of flu develops and spreads that there is no known vaccination to slow it down or stop it. Right now, that is what we have with the coronavirus.
Taking precautions will obviously help but it is pretty easy to spot a person sick with the flu in the communicable stages. Easier to avoid that than a person who looks like everyone else and still in the incubation process.
I am buying a ticket to go back to Jamaica this year and this won't change my plans either.