The reality TV couple is on an ill-timed pre-honeymoon trip to Mexico where they are spending the first days of their marriage dodging the highly contagious swine flu that has killed more than 150 people, according to People.com
"We're definitely wearing face masks everywhere we go," Pratt told Ryan Seacrest on his radio show Tuesday. "We're not playing -- I'm not trying to get pig flu. We're in isolation. We're in full hiding."
The "Hills" stars wed Saturday in California and were in Cabo San Lucas, Mexico, so Montag could shoot her music video "Sex Ed."
"Every second we're washing our hands," Montag said.
The couple will star on "I'm A Celebrity, Get Me Out of Here" this summer and said they plan to take a honeymoon once shooting wraps.
"I think we're discussing with MTV going to Tahiti or Fiji, somewhere tropical and exciting," Pratt said. "We'll see. Since it is a recession, we might just be going to Santa Monica Beach!"