The hepatitis A virus, which causes hepatitis A, infects the liver. In addition to liver failure, it can result in liver scarring. But an early diagnosis can lessen the possibility of a serious infection. In response to HAV infection, the immune system creates IgG antibodies. These antibodies are found by the testing When symptoms of liver illness emerge, this test is recommended to confirm hepatitis A virus infection and to identify HAV infection. The most typical signs and symptoms include fever, exhaustion, jaundice, grey stools, and black urine. If you have HIV, a blood clotting disease, or were in close contact with someone who has HAV, you are more likely to contract it.