If there is a sexually-transmitted disease"aids", how to cure it?

There is no known cure for AIDS. Prayers and hope would do.

AIDS cannot be cured. However there are many contraceptive methods to prevent them

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.