The single best way to protect against the flu is to get vaccinated each year.
During flu season, flu viruses circulate at higher levels in the U.S. population. (“Flu season” in the United States can begin as early as October and last as late as May.) An annual seasonal flu vaccine is the best way to reduce your risk of getting sick with seasonal flu and spreading it to others. When more people get vaccinated against the flu, less flu can spread through that community.
People at High Risk for Developing Flu-Related Complications:
o Children younger than 5, but especially children younger than 2 years old(https://www.cdc.gov/flu/parents/index.htm)
o Adults 65 years of age and older(https://www.cdc.gov/flu/about/disease/65over.htm)
o Pregnant women(https://www.cdc.gov/flu/protect/vaccine/pregnant.htm) (and women up to two weeks postpartum)
o Residents of nursing homes and other long-term care facilities