first COVID-19 vaccine dose by mid-June if provinces stretch the dosing intervals between COVID-19 jabs up to four months, the National Advisory Committee on Immunization said Wednesday.The advisory committee doubled down on its four-month recommendation in a Wednesday morning report, which comes as the country struggles to roll-out vaccinations quickly enough to stem the tide of a third COVID wave. ‘We must all speed up’: Trudeau offers help to provinces as vaccine rollout trails deliveries By allowing for these intervals, nine out of 10 adults over 50 years of age and 75 per cent of adults aged 16 to 49 will be able to get their first vaccine dose by the middle of June, according to a summary within NACI’s decision.“Extending COVID-19.