Is it possible to get a viral infection if you do not leave the house but your house mates do?

I do not leave the house at all unless I am visiting a doctor or going to a holiday party or special event. And today since around mid afternoon, I've felt weird, as if my body is fighting a cold or flu infection and my dad has been coughing a lot. I usually have no symptoms at all after taking my supplements or vitamins or medicinal teas but today my issue has been ongoing for hours.

Is it possible to get a viral infection if you do not leave the house but your house mates do?
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