No vaccine can provide 100% protection – DOH

Department of Health (DOH) Undersecretary Maria Rosario Vergeire said no vaccine that could provide 100% protection against infections has been invented yet.

Vergeire made the statement after UK regulator Medicines, and Healthcare Products Regulatory Agency (MHRA) warned that Pfizer-Biontech’s COVID-19 vaccine could cause allergic reactions.

“Sa ngayon, wala pong 100% na bakuna na makakaprovide ng 100% [protection]. Sa measles po, halimbawa, 93% po after first dose but this increases to 97% after second dose. Sa polio po, after three doses, it reaches 99%. Wala pa hong bakuna na nakakereach ng 100%, but these vaccines can prevent an individual from suffering from the severe form of the disease,” Vergeire said.

“Katulad po ng vaccines that we use on children, hindi po 100% but the vaccine will prevent further complications from the disease. Katulad po ng bakuna laban chicken pox, iyong iba na nabakunahan, nagkakaroon pa rin [ng chicken pox] pero in form na lang since the vaccine prevents the person from developing the severe type of infection,” she added.