(PNA file photo by Ben Briones) MANILA - The Department of Health (DOH) is still studying the vaccination of children four years old and below against the coronavirus disease 2019 (Covid-19). In a media forum on Tuesday, DOH officer-in-charge Undersecretary Maria Rosario Vergeire said such vaccination would need to go through the process of evaluation before it could start in the country. "Patuloy pa rin pong pinag-aaralan ito ng ating mga eksperto, although, nababalitaan na natin at nababasa sa ibang bansa ngayon (Our experts are studying this, although, we've heard and read in other countries now) that they already have evidence," she added. Infectious disease expert Dr. Edsel Salvana said the United States has approved the Covid-19 vaccination for children five years old and below. He noted this measure is "very important". "Habang may butas po tayo sa ating immunity wall, lalo na doon sa mga below five years old, pwede po iyan maging parang reservoir ng