You are assisting a burn victim. the layers of skin and tissues are permanently damaged. the muscles and bones are affected by the burn too. which type of burn is it?

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.