It is safer not to introduce germs into the person, than to eradicate germs that enter the person.
how to introduce a person
the polite way is to introduce the female but if the male is more important than he goes first for example you would introduce the president first then his wife If you are introducing a married couple to another person, you'd probably say the husband first. If you are introducing two people, you would first introduce the one you had brought over to meet the other.
Rhianna
The Cow
It is really good to be polite to people.
east India company
Henry Ford
Eric was the first to introduce themselves to Bella
if you are at dinner with your boss and a new employee walk up how would you introduce that person to your boss
Dr. James Naismith
Jimmy Wales and Larry Sanger.