translated from Spanish: The province of Buenos Aires calls for volunteers to study the combination of vaccines

The Ministry of Health of Buenos Aires called on volunteers, over the age of 18 who have already applied a dose of the coronavirus vaccine, to participate in the drug combination study. The call will be open until Monday, July 12 and those who sign up must not have had coronavirus. In addition, they must have the first dose applied between 15 days and two months prior to registration. The research will be carried out with 1,200 volunteers with the intention of checking if the combination is safe and effective against Covid-19. In addition, it is intended to multiply the possibilities of immunization and test its effect on new variants of the virus. To corroborate the immunity provided by the different vaccine combinations, the selected people will be periodically summoned to perform a blood test in health facilities located in the cities of La Plata, Lanús or Avellaneda. The authorities intend that those summoned reside in the aforementioned districts or that they have mobility to move to these sites. Those who apply for the tests will be divided into groups according to the combination they will receive, each one can touch a vaccine from the same or different laboratory. The combinations of vaccines from different laboratories to be evaluated are as follows: Dose 1 Sputnik V first component, Dose 2 Sinopharm; Dose 1 Oxford/AstraZeneca-Covishield, Dose 2 Oxford/AstraZeneca; Dose 1 Oxford/AstraZeneca-Covishield, Dose 2 Sinopharm- 150 people; Dose 1 Sputnik V first component, Dose 2 Oxford/AstraZeneca-Covishield; Dose 1 Sinopharm, Dose 2 Sinopharm-150 people; Dose 1 Sinopharm, Dose 2 Sputnik-V first component- 150 people and Dose 1 Sinopharm, Dose 2 Oxford/AstraZeneca-Covishield- 150 people. After the combination is done, each person will have a blood draw to measure the antibodies and their ability to neutralize the virus. In addition, cellular immunity will also be measured and they will be monitored by telephone for seven days. The analyses will continue at 14, 28, 56 days and up to one year after the second dose of the scheme is applied. 

Original source in Spanish