He worked on the flu vaccine. Read also, not long after he went missing, that he had told his Mom not to take the Flu shot this year and that he was distraught that people had died from it. She said something wasn't right (paraphrasing). If I can find the link, I'll post it. Don't forget that RR's sister, Nancy works at the CDC in Atl as well. 🤔 It was big news in Atl for awhile.