However, the cough and weakness may persist. Antibiotics have no effect on the flu virus, but Amantadine, an antiviral agent, has proven effective in reducing the duration and severity of symptoms in type A flu. Flu shots are not recommended for anyone allergic to eggs. The flu shot cannot give someone the flu because the vaccine is not alive. Cost for a flu shot vary, but it is generally inexpensive and may be covered by health insurance or Medicare.
Flu vaccine helps prevent other upper respiratory infections.