PNA file photo MANILA - Presidential Adviser for Entrepreneurship Joey Concepcion bats for continuous vaccination drive both for primary and booster shots. During the Laging Handa public briefing Tuesday, Concepcion said the country might lose its gains on building up immunity against coronavirus disease 2019 (Covid-19) if it softens its efforts in giving booster shots. He noted that the efficacy of vaccines wanes at around four to five months, thus rolling out booster shots is critical. "The good part if you are vaccinated, it will be mild and you can just stay at home, get well, and eventually go out," he said. Concepcion, also Go Negosyo founder, reiterated the call of the private sector to de-escalate next month the alert level system to Alert Level 1, which should be considered as the "new normal". However, the government should look into the vaccination rates of provinces as those with inoculation rates of at least 70 percent are advised to further reopen, he