Sick toddler and newborn

Ri

Since the pandemic we've been pretty cautious. We'll after having my 2nd baby our toddler stayed with family and has become sick. So now we have a new born 4 days old and our 22 month old is having such a tough time. He has a cough, low grade fever, yeast infection diaper rash, runny nose. So far we have been using the vapor rub on him, motrin, and have a humidifier going, and antifungal cream. Anything else we can do? The idea of this time being for bonding is out the window and we are just in survival mode. Toddler is sleeping fine but when awake it is absolutely the hardest as everything ends in tears and snot.