JAKARTA, Jan 12 (Reuters) - Indonesia kicked off its COVID-19 booster programme for the general public on Wednesday, as the world"s fourth-most-populous nation hit an almost three-month high in cases amid the rise of the Omicron variant. Elderly and immunocompromised residents, who are being prioritised in the programme, queued up at local health centres to boost their defences against a virus that has infected more than 4 million Indonesians. "I feel safer," said Nurlaeni, 77, after receiving her booster on Wednesday morning. "There"s more Omicron now, so I feel relieved." "For me, for my family, this will protect our health," agreed Rosita Wati, 62, also in the line. "Our immunity will be better." The booster rollout comes amid concern about the spread of the Omicron variant in Indonesia, a densely populated developing nation that was hit with a crippling Delta wave in July. A medical worker performs a health screening on a woman who will receive a booster vaccine dose against the coronavirus disease (COVID-19), as the country starts the booster vaccination program for the general public amid the rises of the Omicron variant in Jakarta, Indonesia, January 12, 2022. REUTERS/Willy Kurniawan A woman receives a booster dose of the Pfizer vaccine, as the country starts the booster vaccination program for the general public amid the rise of the Omicron variant in Jakarta, Indonesia, January 12, 2022. REUTERS/Willy Kurniawan A medical worker prepares a dose of the Pfizer vaccine booster as the country starts the booster vaccination program for the general public amid the rise of the Omicron variant in Jakarta, Indonesia, January 12, 2022. REUTERS/Willy Kurniawan 1/5 A woman receives a booster dose of the Pfizer vaccine, as the country starts the booster vaccination program for the general public amid the rise of the Omicron variant in Jakarta, Indonesia, January 12, 2022. REUTERS/Willy Kurniawan On Tuesday Indonesia recorded 802 new cases, the highest in almost three months, with senior cabinet minister Luhut Panjaitan saying that numbers could peak in February. President Joko Widodo announced Tuesday that boosters would be offered free for all those eligible, after initial discussion about charging for boosters sparked controversy. The booster rollout, for which the Sinovac, Astra Zeneca, Pfizer and Zifivax vaccines have been approved, is running in parallel with the main COVID-19 vaccination programme. Indonesia has pledged to vaccinate more than 208 million of its 270 million people, but less than 56% of that target population has received two shots of a COVID-19 vaccine so far, according to health ministry data. Experts say vaccine hesitancy and logistics in the sprawling archipelago have slowed distribution. Booster shots in Indonesia will be administered as half doses, in line with studies that confirmed the efficacy of that dosage, said health minister Budi Gunadi Sadikin.