Is it safe to eat food after a fly or flies land on it?

Your calls about:

• Is it safe to eat your toast after your cat licks some of the butter off of it?
• Does eating high-collagen-containing foods increase collagen repair of your knee joints?
• Management of pain after a shingles infection
• Can you use semaglutide (Ozempic) if you have a fatty liver?
• Treatment and management of low back pain?
• Side effects of antibiotics