Pakistan will require all travelers leaving the country, including pregnant women, to obtain a polio vaccination as of June 1.
Pakistan's Health Ministry said on May 13 that the restrictions comply with a decision by the World Health Organization (WHO) advising travelers of all ages to be vaccinated by next month.
Last week, Pakistan's Health Ministry said mandatory immunization centers for travelers would be put in place at all airports, border crossings, and seaports.
The WHO said earlier this month that the spread of polio could worsen and destroy nearly 30 years of work to eradicate the disease.
It identified Pakistan, Syria, and Cameroon as having allowed the virus to spread beyond their borders.
With reporting by dawn.com and AP