The CDC, (Centers for Disease Control), influenza vaccination guideline this year is simple: "Everyone 6 months of age and older should receive influenza vaccine."
As you know, with breathing difficulty, it is even more important to protect yourself.
The CDC states in it's recommendation for this year, "Annual influenza vaccination, even when the vaccine strains are unchanged, is important because a person's immune protection from influenza vaccination declines over time. Immunity acquired from vaccine administered last season will have declined and may not be enough to prevent infection this season. So, annual influenza vaccination is recommended for optimal protection."
Get your shot now, make it a family event. It is readily available, even from your local pharmacist. It can not cause you to get the flu, as some people suggest. Of course, as always, consult your doctor.