Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to stay updated on your vaccines [title] Obtain a yearly influenza vaccine. [step] The flu vaccine is available to everyone in the general population every year. It normally becomes available in the late fall months.

Ending1: You can obtain the vaccine at an inpatient hospital or by driving an alternate route to your hotel or workplace. The vaccination is usually administered in the first day of each month for 1 year. Ending2: The vaccine offered each year is slightly different, as it is tailored to the 3 strains of influenza that are most likely to be problematical in the coming year. [substeps] To stay fully up-to-date on your vaccinations, it is recommended to see your family doctor for a flu vaccine every year. Ending3: Just like the flu virus, it's a vaccine that can last up to several years. Each year thereafter, the immune system systems are activated, allowing the infection to spread into the environment. Ending4: You may need to buy this vaccine yourself if you find that you are sick more frequently. [substeps] Vaccinating your virus annually differs if you are still pregnant or lactating.

Answer format: ending1/ending2/ending3/ending4