The NHS said anyone who currently qualifies for their Covid-19 jab (aged over 50 or in at-risk categories) should book their first dose of Covid-19 jabs before 29th March when slots are set to dry up. Officials expect a slowdown in vaccine supplies in April and medics will be focusing on providing second doses. Ministers say the plan to offer a first dose to all adults by July is on track. However NHS England said no first appointments should be booked next month for people under the age of 50 unless they fall into a higher priority group (those who are clinically vulnerable). The reduction in the UK's Covid vaccine supply is partly due to delays in deliveries from India of five million Oxford-AstraZeneca doses. Indian foreign ministry sources said they have placed a temporary hold on all exports of vaccines amid a rising number of domestic cases.