We have abundant traditions that mention how Almighty God wishes to receive us in the next life, pure and chastised from our sins. One way this is done is by inflicting us with difficulties prior to our death, like a sickness.
Traditions mention that being inflicted with a sickness prior to death is a form of purification and cleansing of our sins.
It is for this reason, that one would be rewarded, and we should look at it in a positive way.
As for being considered a "martyr" in the technical word, no, it would not be applied to someone who falls sick because of the virus.
And Allah knows best.