The shot is good for the entire lifetime. But researches have also shown that it is effective for 10 years. However if you become immuno compromised, you might have to get it if you had not taken it in the last 5 year duration
The shot is good for the entire lifetime. But researches have also shown that it is effective for 10 years. However if you become immuno compromised, you might have to get it if you had not taken it in the last 5 year duration