Is there a significant amount of testing going on in Austria, compared to other countries? I'm suprised that you mention these people were tested without symptoms.
As for symptoms: Male (56) fought quite hard to get one, as he had long direct contact with a positive-tested person. Male (80) got one because of "risk group" (age) and symptoms (light fever).
Austria has approx. 8 Mio inhabitants
official source: https://www.sozialministerium.at/Informationen-zum-Coronavir...