I caught coronavirus and walked around the airport coughing
Why did you not quarantine yourself or at least tell someone?
I didn't want to risk missing my flight home.
You basically decided to risk the health of everyone at the airport just so you could get come on time. That's not okay. If you know you're sick with something like that you should tell the proper authority so they can manage the situation instead of potentially getting everyone around you sick.
It's not like people will get sick permanently so I don't see why it matters.
Covid is incredibly contagious. Your actions put so many people at risk because you were selfish.