The side effects of a pneumonia vaccine disappear within one to three days, according to the National Health Service in the United Kingdom. The vaccine is considered to be safe, and the side effects are often mild.
Common side effects of the vaccine are pain, redness, and hardness or swelling at the injection site, explains the NSA. These side effects go away in a couple of days. Using a cold compress helps reduce the swelling. Muscle pain and fatigue are also possible side effects. A massage, warm bath or plenty of rest helps reduce muscle soreness. Side effects such as high fever, allergic reaction and an itchy skin rash require an immediate doctor’s visit, as do swollen glands in the neck that do not go away within a few days.