Hepatitis B virus infection can lead to acute hepatitis B or chronic hepatitis B. If an adult is unable to clear the virus after six months, he or she will be diagnosed with chronic hepatitis B. And if left untreated, the patient can develop complications such as liver cancer and cirrhosis.

Vaccination is the most effective method to prevent some diseases caused by viruses. Along with the disease prevention effect, there is also a risk of unwanted side effects from vaccines such as headache, fever, pain at the injection site, etc. So what should you do when you have a sore arm after vaccination?