Deadly MERS outbreak may have peaked; 3,000 remain in isolation

South Korea believes its MERS virus outbreak may have peaked.

Experts say the next few days will be critical to determining whether the government's belated efforts have successfully stymied a disease that has killed seven people and infected nearly 100 in the country.

The maximum incubation period for those infected by a second "super-spreader" ends around Friday, experts said, raising hopes that the outbreak could weaken soon.