The club is following the advice of the NHS. The clubs players have been near or in contact with anyone who has contradicted or is quarantined with the Coronavirus and has thus not burdened the public health system with having the players needlessly checked over other more urgent patients who DO have symptoms of a cold.
The club also aknowledges, like most sane people on the planet, that this is a very deadly illness for those in society who are of advanced age, newborn children and otherwise immunocompromised.
So yes, it IS a very serious matter. If i get the virus, I will be fine, 99.999% certain. I'm at my peak physical condition and in excellent health. If my grandmother who is 85 and in frail health gets it she is at very serious risk of not making it if she develops severe resporatory symptoms..
Due to the immense precautions being taken, people flooding the helplines asking for advice, and general stress of he infrastructure in term of healthsupply, there is absolutely no need to add to the problem unless there is cause to. If any of the clubs player develops as much as a sniffle, the entire club will be quarantined immediately until a test result is available.