In light of this global race to produce the vaccine, Reuters reported that the “Pfizer” vaccine has had side effects on volunteers. Although the success rate of the vaccine has reached 90 percent, some volunteers reported side effects such as headache and muscle pain. One of the volunteers, Glen Deschilders (44 years), said that the side effects were similar to “severe drunken headache”, but that they disappeared quickly.
Usually, volunteers are divided into two parts, one section receiving a vaccine and another section receiving a placebo vaccine. The volunteers do not know if they received the vaccine or not, but Deschilds said that his subsequent antibody test showed that he had developed antibodies to the virus, which convinced him that he had received a real vaccine.
Another volunteer, aged 45, said she suffered from “fever, headache, and body aches” after receiving the first vaccine injection, and likened her and her side effects to the influenza vaccine. She added that the symptoms got worse with the second injection.
And the American company “Pfizer” and the German “Biontech” announced that they measured “this effectiveness of the vaccine” by comparing the number of participants who were infected with the Coronavirus in the group that received the vaccine, and the number of infected people in another group who received a placebo vaccine, and according to the initial results, the protection of patients was achieved after Seven days after receiving the second dose and 28 days after receiving the first dose.
According to the company, the efficacy rate of the vaccine exceeded the minimum required from the US Food and Drug Registration and Licensing Center (FDA), in order to obtain a license to produce the vaccine. Clinical trials did not show any side effects. The company intends to request emergency approval to deploy the vaccine until the end of this month, as a maximum.