Why Get a Flu Shot? Posted on September 3, 2026September 3, 2026 Flu can interrupt school, work, travel and time with family and friends. Getting vaccinated is one step you can take to help protect your health during flu season. A little prevention can go a long way A flu shot can reduce your risk of getting sick with flu and lower the risk of serious complications if you do get sick. Vaccination is especially important for people who are more likely to become seriously ill from flu, including older adults, young children, pregnant people and people with certain health conditions. Help keep your plans on track Flu season overlaps with school, sports, holidays, travel and other fall and winter activities. Getting vaccinated is one practical step you can take now to prepare for the months ahead. Free flu vaccines are available San Mateo County Health is offering free flu vaccine clinics for a limited time at locations throughout the county. No appointment, ID or health insurance is needed. Clinic dates, hours and age requirements vary by location. Give wellness your best shot Find a free flu vaccine clinic View upcoming clinic dates, locations and hours and find one that works for you. View the clinic schedule