You can catch COVID out in the fresh air.
Being outdoors lessens your risk of catching COVID although even when outside in the fresh air you can still catch COVID, especially if you're around someone that has COVID.
Being outside and in the fresh air lowers your risk of catching COVID significantly because the fresh outdoor air disperses the virus carrying droplets and particles that transmit COVID.
This makes transmission of COVID and other viruses harder than it would be indoors.
However being in close contact with an infected person or people, especially in crowded outdoor settings or for extended periods, still pose a risk of you developing COVID.
So even when outdoors you should try to stay away from people as much as you can and if possible wear a mask.
If you can, having your windows open to allow fresh air in can also help lower the risk of COVID and other viruses as you allow fresh air into the house or room.
This prevents you from breathing in air that could have viruses and germs in the air as much as it would if you kept the windows closed.
Outdoors is also good for when you're sick or have COVID as wind and natural ventilation constantly moves the air and dilutes the COVID virus and other virus concentrations.
And it's also most often easier to maintain physical distance from other people outdoors.
However being in crowds and in close contact with people could increase your risk of getting COVID and other viruses.
High density outdoor events like concerts, busy markets, stores etc increase your chance of close exposure to COVID and other viruses.
And prolonged face to face conversations or activities where you're very near someone infectious also increases your risk of COVID and other infections.