| UPDATED: 19:39, Fri, Dec 18, 2020 Link copied Sign up for FREE health tips to live a long and happy life SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they'll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. Covid vaccination programmes have officially kicked off in the UK last week with the distribution of the Pfizer jab. The vaccine, which researchers found was up to 95 percent effective, has since made its way through hundreds of thousands of people. But the process is still rather complicated with a few side effects being reported. The vaccine has to be administered in two doses, but recent data reveals that it could be administered with just a single dose. If true, it could mean a major ease on pressure administering it worldwide and allowing up twice the number of people to be vaccinated.