Cameron is at Hogwarts because virtual learning wouldn't go so well in their home, but assuming Hogwarts canceled quidditch matches he'd be visibly annoyed most of the time. He probably pretended to cough on someone during first feast and got a number of death glares, and kept it cool for the rest of the semester. He wears a mask, but is always complaining of it being itchy and probably has it under his chin or at least under his nose whenever he's outside.

Lach is either (A) playing quidditch in the professional bubble and hating the no-fans thing, or (B) isolating himself to the Hebrides where he's put on fifteen pounds and has decided betting on dragon-related things with his family is a fun idea.

Holly is doing face-to-face learning and has taken to learning new skills during quarantine time in her dorm. Constance Sykes probably checks in on her a lot, to which Holly responds by showing what ever crazy/ridiculous spell or potion she's just learned.

Flora is doing distance learning with the finest tutor her mother could afford. She thinks she's invincible and of course she won't die, but she wears the mask when out in public because she doesn't want to look bad.

Charity is charting the death count in her journal. She has her theories about how it originated and how bad it'll get. She probably told Evander he's basically an elderly person and should not leave the house. She's banned Alfred from entering her bedroom because she knows he's probably not doing quarantine properly.

Helga got mask-acne a month ago and refuses to wear it anymore. Besides, it's more romantic to die in a plague than look ugly.

Eldin is happy that his mother and sister are both healers because they can all be in their medical bubble together. He's also side-eyeing anyone who coughs in public. Wears an N95 AND a face shield, and yells at anyone who thinks wearing plastic gloves is a good idea.

Edric is working from home because his wife is pregnant. Zoom meetings aren't going well.