There might be. I bet flight attendants take more sick days than most workers do and there are very real financial implications of a flight being delayed due to lack of staff.
I'll take your hypothetical bet with my own speculation to the contrary: I imagine most flight attendants are in better physical shape than, say, your typical office worker due to the nature of their job, as well as being more on top of preventative health measures (vaccines and such) precisely because they know they're at higher risk due to the number of people they're exposed to.
Their significant others on the other hand, they're sick as hell all the time...