Inactivated Flu Vaccine in Pregnancy

Pregnancy can alter the body's response to respiratory infections, so influenza may cause more serious illness than it would at other times. An inactivated vaccine presents a prepared immune target rather than live influenza virus and cannot cause flu infection. Protection develops after vaccination and is not a substitute for prompt assessment if flu symptoms become severe.

The product and timing should be checked with your maternity or primary-care clinician. A history of severe vaccine reaction, current illness, or a condition affecting immunity may change the advice. Learn more about [Inactivated Vaccine](/materials/inactivated-vaccine/).

Tell the vaccinator that you are pregnant, mention allergies and previous vaccine reactions, and keep a record of the product given. Mild soreness or feeling unwell can occur after vaccination. Rest, fluids, and clinician-approved symptom relief may help. Household protection and routine vaccines can be discussed as part of preventive care.

Seek urgent care for breathing difficulty, facial or throat swelling, collapse, or rapidly spreading hives after vaccination. Contact your maternity team for persistent high fever, severe weakness, dehydration, or worsening respiratory symptoms after exposure to influenza. Do not delay urgent assessment while waiting for vaccine protection.

Ask which inactivated flu vaccine is suitable, when it should be given, how your medical history affects the decision, and what symptoms after vaccination require urgent help.