European stock exchanges recorded a significant increase, in the middle of the day, Monday, after the American company Pfizer announced the effectiveness of its vaccine against Covid-19 by 90%, which is what the world and the markets expect .

According to Sky News Arabia, Pfizer and Biontec had announced that the vaccine against Covid-19 that they are developing is 90 percent effective, after preliminary analysis of the results of the stage The third of clinical trials, the last before submitting his license application.

The two companies said in a joint statement that this effectiveness of the vaccine was measured by comparing the number of participants who were infected with the new Corona virus in the group that received the vaccine and the number of infected people in another group that received A placebo vaccine, 7 days after receiving the second dose and 28 days after receiving the first dose.

and at about 11:00 GMT, after the two companies announced the vaccine, European financial markets recorded a significant increase by more than 5 percent in Paris, Frankfurt and Milan, and by 3.29 percent in London.