As we enter the wintery COLD-months, people WILL sneeze more.

…
"It's SCIENCE!"
(--'Anchorman')

… Ergo, I could EITHER be polite and cultural by saying, (PHONETIC Turkish:) 'CHOHK-yah-SHAH'--'Bless you'.

OR,

I could try to "lighten the mood" by quoting 'Seinfeld':
"You are SO good-looking."






CONCLUSION:
"Bundle up!"