In individuals with established asthma, viruses can trigger acute asthma exacerbations. This is the case most often for individuals whose asthma is severe or poorly controlled. The reason behind this is an imbalance of inflammatory pathways. Cell signaling molecules responsible for keeping inflammation under control are lowered and cell signaling molecules causing inflammation are made in excess. Too much inflammation can damage the body’s normal tissues causing more severe illness.
Specifically, when we examine COVID-19, most people (around 80%) have mild symptoms such as fever and feeling generally unwell. However, around 20% develop more serious symptoms such as shortness of breath, chest pain and pneumonia and people suffering from asthma have a higher chance of falling in this group. Furthermore, the fatality rate from the disease is 6% for individuals with long term lung conditions (including but not limited to asthma), while those without any pre-existing medical conditions have a rate of 0.9%.
While the risk of catching coronavirus is low in the US at the time of writing, there are several steps you can take to:
Having a viral infection when you have asthma can make you more vulnerable to having exacerbations of your asthma. It is important to control your asthma and take simple steps to stop viral spread such as washing your hands. This will help with regards to all respiratory infections whether it be COVID-19 or flu. As the coronavirus situation is developing be sure to stay updated and to follow guidelines.