Covid-19: Fourth vaccine dose potentially on the cards for health workers, at-risk people

Officials are looking into the possibility of rolling out a fourth dose of Covid-19 vaccine for vulnerable and high risk groups. Director-General of Health Dr Ashley Bloomfield announced he would this week receive advice on a fourth shot specifically for those at highest risk of Covid-19 illness: older people, and those with pre-existing conditions. He said he also asked whether the offer should be extended to other groups, such as the health workforce, who were among the first to receive boosters