The specific type of coronavirus is clear from context. Language would be very tiresome if we had to give a full taxonomy for every term we use. For instances

The specific type of coronavirus is clear from context. Language would be very tiresome if we had to give a full taxonomy for every term we use. For instances I say "I saw a fox outside my house yesterday". I don't need to specify the exact species of fox, and anybody who knows that I live in Europe will know that I mean vulpes vulpes.