Photo taken on April 7, 2021 shows a vaccination center in Lahore, Punjab province, Pakistan. So far, more than 1 million people have been vaccinated in Pakistan, and the total number of people who have registered themselves for vaccination is now over 2 million, according to the National Command and Operation Center (NCOC) chief Asad Umar. (Photo by Sajjad/Xinhua)
A medical worker prepares a dose of COVID-19 vaccine at a vaccination center in Lahore, Punjab province, Pakistan, April 7, 2021. So far, more than 1 million people have been vaccinated in Pakistan, and the total number of people who have registered themselves for vaccination is now over 2 million, according to the National Command and Operation Center (NCOC) chief Asad Umar. (Photo by Sajjad/Xinhua)
A senior citizen receives a dose of COVID-19 vaccine at a vaccination center in northwest Pakistan's Peshawar on April 7, 2021. So far, more than 1 million people have been vaccinated in Pakistan, and the total number of people who have registered themselves for vaccination is now over 2 million, according to the National Command and Operation Center (NCOC) chief Asad Umar. (Photo by Saeed Ahmad/Xinhua)
A senior citizen receives a dose of COVID-19 vaccine at a vaccination center in northwest Pakistan's Peshawar on April 7, 2021. So far, more than 1 million people have been vaccinated in Pakistan, and the total number of people who have registered themselves for vaccination is now over 2 million, according to the National Command and Operation Center (NCOC) chief Asad Umar. (Photo by Saeed Ahmad/Xinhua)
A senior citizen receives a dose of COVID-19 vaccine at a vaccination center in northwest Pakistan's Peshawar on April 7, 2021. So far, more than 1 million people have been vaccinated in Pakistan, and the total number of people who have registered themselves for vaccination is now over 2 million, according to the National Command and Operation Center (NCOC) chief Asad Umar. (Photo by Saeed Ahmad/Xinhua)
A woman receives a dose of COVID-19 vaccine at a vaccination center in Lahore, Punjab province, Pakistan, April 7, 2021. So far, more than 1 million people have been vaccinated in Pakistan, and the total number of people who have registered themselves for vaccination is now over 2 million, according to the National Command and Operation Center (NCOC) chief Asad Umar. (Photo by Sajjad/Xinhua)
A senior citizen receives a dose of COVID-19 vaccine at a vaccination center in northwest Pakistan's Peshawar on April 7, 2021. So far, more than 1 million people have been vaccinated in Pakistan, and the total number of people who have registered themselves for vaccination is now over 2 million, according to the National Command and Operation Center (NCOC) chief Asad Umar. (Photo by Saeed Ahmad/Xinhua)