Finally, Qatar also has a supply agreement with the American biotech company. Advances in the fight to find a vaccine.Moderna announced last week that it is in the final stages of its vaccine trial, which has shown 94.5% effectiveness in preventing coronavirus infections. A week before Moderna, Pfizer also announced that its vaccine is 95% effective. In addition, Pfizer has already initiated the procedures to obtain regulatory approval for it. The last Western laboratory to announce its advances has been Astrazeneca, which works in collaboration with the University of Oxford, and which has also announced that the effectiveness of the vaccine reaches 90% depending on the type of administration that is made. Once the hurdle of finding a vaccine is overcome, the next challenge will be the vaccination campaign. For this, the conservation conditions will be key. Moderna's vaccine is less demanding on cold conditions, but Pfizer's should be stored at minus 70 degrees.