A total of 20,966 Afghan refugees returned to their country on Wednesday.
Trachoma has been known in Senegal since the early 1900s.
About 200 polio workers and officers have been killed since 2012 when the first attacks were launched.
Three children and two adults were among the dead, an army statement said.
The Pakistani military and Islamist militants have been fighting each other in the region for more than two decades.
Nearly 400 Afghan nationals have been set free from Pakistani jails and returned to their homeland over the past couple of weeks.
Pakistan declared a staff member of the Indian High Commission in Islamabad as persona non grata.
The step was taken following a ceasefire agreement between the two countries, which was reached on Saturday.
The agreement follows days of escalated tensions, including drone, missile, and airstrikes targeting military installations and airbases.
Explosions were heard at Jammu and Kashmir capital Srinagar and blackouts were enforced in several border areas amid suspected drone intrusions
