Paano natin maiiwasan ang pagkahawa mula sa mga mikrobyong ating pinag aralan

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.   

By placing 2 fingers at the sternum (the spot where the lower ribs meet) the put the heel of your other hand next to your fingers. hope this

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.

What are the choices?