I've will have the flight for Seul after tomorrow is the MERS a real danger? Is it better that I change my travel plans?
No, don't change plans. MERS is not that easy to transmit, person-to-person infection rates are low.
It seems that the South Korean habit of lots of family members staying in the hospital roo of a sick person, to care for them, is contributing to the high number of cases.
Stay away from hospital. You'll be fine. over 5 years ago