Blame that death on the doctor being unaware of problems with aspirin. (many decades ago?) Chickenpox barely had anything to do with the death; many ordinary illnesses would give the same result.
A quick check of what Reye's Syndrome was would have told you that it is both associated with chickenpox and the first paper to make the link to aspirin was in 1989 (add time for that information to be fully understood and disseminated).
It's also associated with the flu and, generally, with upper respiratory tract infections.