Flu Vaccines for People with Asthma
Most injectable influenza vaccines (or flu shots) are approved for use in people 6 months and older, regardless of whether or not they have asthma or other health conditions. Flu shots have a long-established safety record in people with asthma. People with asthma should generally not receive the nasal spray flu vaccine (i.e., the live attenuated influenza vaccine or LAIV).
People with asthma who are aged 5 years and older, talk to your health care provider before getting the nasal spray vaccine.
Children 2 to 4 years old who have asthma or who have had a history of wheezing in the past 12 months should not get the nasal spray vaccine.
Read more at: https://www.cdc.gov/flu/highrisk/asthma.htm