Baby sick again

Please ease my anxious mind. My daughter has a cold with cough and runny nose (no fever) that started two days ago. She’s not in daycare.

Her first sickness was a flu and occurred was when in early October (we briefly put her in daycare then).

So this would be the second times she gotten sick at 10.5m. If she was still in daycare I wouldn’t worry but since she’s not in daycare I’m just concerned her being sick has something to do with a bigger immune issue or something (this is my anxiety and health ocd talking).

She’s acting her normal self and I suspect she’s teething her molars. So I’m not really concerned about the sickness but just not sure how sick babies get if they don’t go to daycare. According to my mom, I “never got sick” until I went to daycare at age 3 so I gusss I’m a little concerned because of that.

She does go to baby classes twice a week. We take her to restaurants occasionally and stores etc.

Is it normal for babies to get sick so frequently even not in daycare is my question