what i know of polio vaccine protocol by DOH and this is in barangay centers is 3 times first through mouth, after a month sa through bibig pa rin and then 3rd is oral then inject. Sa kulay naman probably because iba na ung supplier nila. It should not be the kulay that you should concern about but the expiry date and if the vaccine was expose to a lot of heat. all vaccines have indicator for you to know the exposure to heat.
Anonymous