www.asthma.org.uk/advice/triggers/coronavirus-covid-19/
If you have asthma and have no symptoms of COVID-19:
Wash your hands often with soap and warm water.
Use tissues to wipe your nose or catch a sneeze, and then put them in the bin straight away.
Don’t touch your eyes, nose or mouth if your hands aren’t clean.
Avoid unnecessary interactions with other people. This means avoiding large gatherings, shaking hands with people or hugging them, and unnecessary travel, especially on public transport. You should also avoid going to public venues like bars, restaurants and cinemas. If it’s possible in your job, try to work from home.
You do NOT need to stay inside your house at all times or self-isolate. You can go for a walk, or to the park, or to the shops if you need to buy things. Just try to cut down the number of people you meet with on a daily basis. And try to keep your distance from people when you see them.
Carry on taking all your usual asthma medicines as normal.
If someone you live with develops symptoms of COVID-19, you will need to stay in your home for 14 days.