The flu vaccine helps protect against the influenza virus strains that are anticipated to be most prevalent during the flu season. People with respiratory conditions are more susceptible to respiratory infections2. The flu can be particularly severe for individuals with respiratory conditions. This is why the flu vaccine is recommended. If a vaccinated individual did contract the flu, it is likely to be milder, and not last as long3.
2 Flu vaccinations | Asthma + Lung UK (asthmaandlung.org.uk)
3 Flu Vaccine - NHS (www.nhs.uk)