opiekować się czymś in English:

We need to learn everything we can about it and do everything we can to take care of it.

The best way to take care of your health is to visit a doctor always when is an alarming symptom.

Husbands should stay at home and take care of the baby. Don't worry about me, I can take care of myself.

How can you take care of your body?

I have to take care of my little sister this afternoon.