Rajani LaRocca

Jyoti is overwhelmed when she visits her grandmother in India for the first time, but she and Sita Pati quickly form a bond. When Pati visits Jyoti in America, it is Jyoti's turn to help her grandmother feel welcome.

"Do you remember every time you've been sick? You may not, but your body does! With many illnesses, you can't get sick more than once because your body remembers and fights it off before you get sick again. But what if your body could recognize germs that you've never had before so you don't get ill? There's where vaccines come in!"--