Most of the common infections -- colds, flu, diarrhea -- you get environmentally transmitted either in the air or on surfaces you touch. I think people under-rate surfaces.

We don't want to make people overly paranoid here. You can reduce your risk of getting colds and flu by a few simple actions. You are always gambling with germs. You just want to keep the odds in your favor.

Eighty percent of all infections are transmitted by direct and indirect contact.

There is no part of the UK that remains unaffected by HIV or other sexually transmitted infections.

If you have cold or flu symptoms, you can't donate because you don't want those viruses to be transmitted through your blood products.

Only birds can be infected. There is no bird flu strain that can be transmitted to humans in Dagestan.