Lol no they don't. People have the ability to genetically modify already existing viruses and bacteria. HIV, H1N1, and ebola are all naturally occurring infectious viruses and anybody with any education in biology knows that.
Because diseases are caused by pathogens...organisms, virus, bacteria, protozoa. If you know of any human being magically inventing an organism out of thin air, let me know. People can alter already existing organism, yes. This idiot said diseases caused by naturally-occurring organisms were made by white men, which is not only false, but c00nish because he's granting white people magical powers, and presupposing that biological and medicine is the sole province of white people, as if there aren't biologists and medical doctors of all races including black people.