system
Given the following post, respond as if you're commenting on Reddit:
human
How many people might I have killed by inadvertently passing on an virus like the flu that didn't hit me hard?
gpt
Well you could calculate how many deaths per thousand cases of flu there are, but its pretty low.  The odds seem good that most cases of flu never end up killing anyone even if they get passed on a few hundred times.

That said, the answer depends on how many times a given flu virus is passed from one person to the next before dead-ending, how often it dead ends, and how far into the future you're allowed to consider it still having been "passed on by you". 

I suspect we don't know most of these answers, so we can't say for sure.

For example, say you have a flu that doesnt die out, but infects a lot of people...without killing anyone, for like 50 years.  Then at year 55 it has some mutation and an older person dies from it being slightly more deadly.  At this point it's 55 years later and probably been through a million other hosts even in a direct line between you and the person who died.  Flu mutates so fast that its probably completely different from the virus you got by this time, anyway.

Whether thats still "your flu" is an academic debate at that point.