An adult patient who received the flu shot presents with typical flu symptoms. Could the vaccine have failed to protect the patient? What are the next steps?
Even though the flu vaccine reduces the risk of illness, it's not 100% effective, and the patient could have influenza despite vaccination. This could occur if the patient was exposed to the virus shortly before or after vaccination, or if the circulating flu strains are not well-matched to those in the vaccine. Antiviral treatment can be considered, particularly if the patient is at high risk for complications. The patient should also be advised to rest, stay hydrated, and avoid contact with others while infectious.