The government has started accepting reservations from unvaccinated senior citizens for the Pfizer COVID-19 vaccine on Wednesday. 

According to the state vaccination task force, senior citizens who made reservations for the AstraZeneca vaccine but have yet to be inoculated can now make appointments to receive the Pfizer vaccine next month. 

Around 200-thousand people - those aged 60 to 74 and those suffering from chronic respiratory diseases – will be allowed to make reservations through 6 p.m. next Wednesday and receive their first shots from July 5 to July 17. 

They need to first cancel their reservations for the AstraZeneca vaccine in order to apply for the Pfizer vaccine. 

The shift from AstraZeneca to Pfizer is reportedly due to the supply schedule for the third quarter with the Pfizer and Moderna vaccines expected to become the main vaccine products to be administered in the July to September period.