Help! Hamster might have COVID

[Mede]

Hello everybody!
I have a russian dwarf (Djungarian) hamster around 2 years old. My whole family were tested positive for covid, so im afraid i can infect my ham. I haven’t handled him for 9 days, ventilate my room often, change supplies in gloves and keep him in my room as far from me as possible. Anyways, yesterday he wasn’t running on the wheel and screamed at night. Idk, maybe loneliness harms him and he had a bad dream? He is quite sociable and he was looking for me for the first three days.
Or he was screaming from pain and he’s infected? I saw him moving today and eating, not lethargic at all. But im still worried. What signs should i look for? And how to medicate him if he shows symptoms? Vets in russia don’t acknowledge hamster covid. Also how do you think is prolonged loneliness ok for a sociable hamster ? Are there any risks? Sorry for my english+ thanks in advance.