Girls, please help! We're in quarantine and I'm sick. Feeding through a…

Girls, please help! We're in quarantine and I'm sick. Feeding through a mask. Mostly my daughter-in-law watches over her. My daughter didn't sleep well at night. And today she noticed that she started coughing a lot. What can I do so that she doesn't get sick too? I'm applying Osalin ointment. I don't want it to start for the little ones either.