Runny Nose, No Fever

Today I developed a few Covid-like symptoms: runny nose, dry throat, slight cough. I do not have a fever, but, according to hopkinsmedicine.org:

Yes, you can be infected with the coronavirus and have a cough or other symptoms with no fever, or a very low-grade one, especially in the first few days. Keep in mind that it is also possible to have COVID-19 with minimal or even no symptoms at all.

The seasons are changing and I may very well just have allergies. Antihistamines did make me feel a little better but I think I am going to keep myself locked in my house as much as possible (which is pretty much all of the time). Can't be too careful with the delta variant!