According to preliminary results of the study on this reinforcement, commissioned by the Ministry of Health to the University of Oxford, the heterologous scheme, which combines different immunization agents, increases the human body′s defense system. In this case, the folder recommends that the booster dose be with the Pfizer vaccine.
To date, more than 344 million doses of Covid vaccine have been distributed, and about 280 million have been administered.
Booster dose
The reinforcement is recommended by the Ministry of Health due to the high number of complications and deaths from the disease in priority groups. For the decision, the increase in the body′s immune response after the application of a new dose was considered. The period of application of the booster in people over 60 years of age is six months, after the application of the last dose of the vaccine schedule (second dose or single dose), regardless of the immunizing agent applied. In immunosuppressed patients, the interval between doses should be 28 days.
Another point that needs to be highlighted is that the effectiveness of vaccines requires that doses are stored and stored correctly. The ideal temperature range recommended by the manufacturer, and according to ANVISA′s Cold Chain Manual, varies between 2ºC and 8ºC. For this, scientific conservation chambers, equipment with specific technology that preserve the integrity of immunobiologicals, are needed.