It says, a person should pray not to get sick. Once a person gets sick ch’v, he needs special protection, zechusim to get cured. Besides prayer, we must do everything possible like wearing masks, washing hands and social distancing to protect ourselves from the coronavirus and then Hashem will help us. It is a mitzva of ushmartem meod lenafshosechem to protect ourselves from getting sick. If a person endangers himself, he will not be helped.