RIO DE JANEIRO, BRAZIL - Will there be vaccines? This is certain. Will they be effective? We do not know that. For instance, a vaccine for HIV (the virus that causes AIDS) has also been developed, but it has never been successful. For SARS-Cov-2 (the virus that causes Covid-19) vaccines are currently being developed, and once they are tested we will be able to tell whether or not they work.
What we currently know is that no person infected with HIV has ever healed naturally through their immune system, but in the case of the novel coronavirus infection . . .