Jessica Kirby, head of health advice at Asthma UK, said this could therefore affect around 5.4 million people in the UK.
She said: "Respiratory viruses like this can trigger asthma symptoms and could lead to an asthma attack.
"It is essential that you take your preventer, daily as prescribed. This helps cut the risk of an asthma attack being triggered by any virus, including coronavirus.
"Keeping a reliever inhaler to hand is vital, so you can use it if you get asthma symptoms.
Meanwhile, smokers have also been warned of their heightened risk from the infection due to a cigarette's effect on a person's immune system.
"This reduces your natural protection against infections, like coronavirus," a press release from the Irish health service said
It added that this means smokers are at an increased risk of contracting acute respiratory infections, of it lengthening the time of the infection, and of suffering more severe consequences.