You can smell other people’s mucous (not recommended). If you ever have been the primary care taker for a baby or small child you’d know what boogers smell like. Old boogers also start to decompose and the smell is faintly different. Sick mucous also smells different and worse. I could tell my nephews were sick with the flu by smelling them from ways away before noticing any other symptom. Sometimes I can smell that in public transport and it makes me figuratively run in the opposite direction of the sick person.
Share your source, otherwise this is just bullshit. I think it’s bullshit.
Edit: I don’t doubt the covid part. Maybe that causes weird reactions. It’s been described to me as “different”, rather than a loss of smell.
Edit 2: Still no source. Downvote all you want, you’re still not convincing any scientifically minded individual that you’re correct.
You can smell other people’s mucous (not recommended). If you ever have been the primary care taker for a baby or small child you’d know what boogers smell like. Old boogers also start to decompose and the smell is faintly different. Sick mucous also smells different and worse. I could tell my nephews were sick with the flu by smelling them from ways away before noticing any other symptom. Sometimes I can smell that in public transport and it makes me figuratively run in the opposite direction of the sick person.