Devils advocate here: my mom had the flu beginning of December (like, full first week of december) and is STILL coughing. They came to visit the week between Christmas and New Years and she had a horrible cough, she was worried so she got a covid test just in case so she didn't bring anything here to spread it to us, they also flu tested her and she was negative for both but sounded absolutely horrendous. She wanted to go out shopping for a few craft supplies while here, took some cough syrup, and only coughed one time but we had a lady lose it on us in the store (my mom was masked, and had ONE cough). Omicron is actually mostly snot, like a regular cold, but there is more than that going around right now and sometimes that just lingers in people.
On a different note: On our family trip to WDW over Memorial day week I had a kid cough right in my face as I was going to put my mask on to get in line for haunted mansion (I mean, could not have gotten me more square in the face with that cough), and 3 days later I woke up with a screaming sore throat and feeling horrible. It was the day we were supposed to drive home anyway so we informed the resort so they would know for housekeeping, and then we drove home (6.5-7 hour drive). If it hadn't been check out day we probably would have shortened our trip anyway, but we were lucky we can easily drive home. It ended up being just a bad cold, and no one else in my family got sick thank goodness, but it was a reminder to always be prepared for it.