Ay, thanks sa info! So basically ang Vax Cert PH is yung official certificate na WHO-approved, unlike lang sa regular vaccination card from your LGU, kaya yan ang kailangan mo if you're planning to travel abroad, hindi lang local. A few of my mum friends had to get theirs din when we were planning a family trip last year, and super convenient lang na online ang process through that DOH link, no hassle!