HIV is a virus. In 2016, around 1.1 million people in the USA have it. The HIV turns into AIDS if they do nothing. They can get pills if they go to a doctor.
The pills can stop the HIV. You do not get AIDS if you take the pills. However, you must keep taking the pills. You cannot get completely OK.
Scientists are working on a cure. They make a big step forward. They use a new method. They try it on mice. They cure nine out of 21 mice.
Difficult words: cure noun (something which ends a sickness and makes it go away), step forward (work well and find something good and new), cure verb (end a sickness and make someone better).