Duck
I suggest you email the sick captain and let him know how many hours you are in the hole for.
I think you should tell him you expect him to send you remuneration to make you whole financially. Granted, it is no compensation for you being out of commission or potentially passing on his condition to your family.
In future, insist that an irresponsible pilot call in sick and if he doesn't, then involve the duty officer. If they won't remove him, insist on RMG for yourself. (Removed by management with pay)
We will insist on more quarantining of our sick pilots as a result of this SLB discussion. And that's a good thing.
I hope your family doesn't catch what you picked up.