Jurisdiction is Belgium.
Suppose a college student goes to an illegal student party and catches COVID there. He doesn't get caught by the police, he has no symptoms and he then doesn't self-isolate and goes to visit his grandmother. She is infected with COVID due to it and dies.
Could the student get charged with one of the "causing the death of another person" crimes like murder or manslaughter? And if not, Could there be any civil grounds for a lawsuit?
Bonus question: does it make any difference if the student beforehand posted a social media message stating he would be throwing parties and visiting the elderly without a mask because humans are born to socialize (actual tweet I've seen posted, though by a UK TV personality)?