Antibiotic Resistance
Antibiotic Resistance is when germs change so that medicines that used to kill them no longer work.
Think of it this way
You have a jar of mixed candies — most are soft, but a few are hard. A sponge soaks up the soft ones and removes them. Only the hard candies remain. The hard candies fill the jar and make more hard candies, so the sponge cannot clear the jar at all.
Explaining antibiotic resistance by grade level
Some germs can get sick from medicine. But some germs change. The medicine stops working on them. These strong germs keep growing. Doctors must find new ways to stop them.