The UK has become the first country in the world to approve the vaccine from Pfizer, paving the way for mass vaccination. Britain’s medicines regulator, the MHRA, has confirmed the vaccine,

which offers up to 95 percent protection against Covid-19, is safe to be rolled out to the public. The first doses are already on their way to the UK, with 800,000 due in the coming days,

Pfizer said. Health Secretary Matt Hancock said the NHS will be contacting people when it’s time for them to be vaccinated. WHAT IS IN THE PFIZER COVID VACCINE? The new Pfizer Covid vaccine

is an mRNA immunisation. MRNA is short for Messenger Ribonucleic acid and is present in all living cells naturally. The definition of mRNA is that it acts as a messenger carrying information

cause disease in healthy people, or killed altogether, which makes it an inactive ingredient. Many vaccines only contain parts of viruses or bacteria, usually proteins or sugars from the

surface. These are safe for human consumption because they work by stimulating the immune system without actually causing disease. Compared to the number of bacteria and viruses in the

environment that our immune systems have to deal with on a daily basis, active ingredients found in vaccine are miniscule. Most bacterial vaccines contain just a few proteins or sugars from

the relevant bacterium, but by contrast, 100 trillion bacteria are estimated to live on the skin of the average human, each of them containing thousands of proteins which constantly

challenge the immune system. Vaccines also contain some added ingredients, such as aluminium salts, which help improve the immune system’s response to the jab, or other products that act as

preservatives and stabilisers. These are often listen on vaccine information leaflets as ‘excipients’, or inactive ingredients, and just like the vaccine, most of the medicines you are

accustomed to ingesting also contain excipients.