UPI reports people sickened with COVID-19 produce "high-quality" antibodies.br The antibodies work against the virus five to seven months after they become infected.br The findings suggest those infected with COVID-19 potentially can develop a long-lasting immunity to it.br Antibodies are proteins produced by the human immune system to help the body fight off viruses.br Many concerns have been expressed about immunity against COVID-19 not lasting.br We learn more and more about the virus as the days pass but there is still so much we don't know.