coronavirus vaccines.The rapid development and approval of drugs has been hailed the world over, questions remain about the availability, effectiveness and side effects of the jabs.- How many vaccines? -It usually takes roughly 10 years to develop and market a new vaccine, but the process was vastly accelerated for Covid-19.A vaccine developed by the American company Pfizer and the German company BioNTech was approved for use in Britain on December 2.
Thousands of older people have since received the first dose.A total of 16 countries and the European Union have given the green light to the Pfizer-BioNTech vaccine.The US Food and Drug Administration granted emergency authorisations to the Pfizer-BioNTech drug and another jab from the.