Antibodies against Covid in Sinovac vaccine drop after six months: which countries apply it? | the Chronicle

A new study conducted in China warned that antibody of Sinovac Biotech vacuum vs coronavirus they are reduced by six months after applying the second dose in most cases. Since the start of the pandemic by Covid-19 More than 194 million cases and more than 4.16 deaths have been recorded from this virus.

These first results were made on the basis of the blood analysis of adults without pathologies between 18 and 59 years old. As reported by Reuters news agency, people received the two doses of Sinovac vacuum.

The study was carried out by researchers from disease control authorities in Jiangsu, with other experts from Sinovac and Chinese institutions.

Vaccinated people received the corresponding doses two to four weeks apart. Of the first group, 16.9 percent and of the second, only 35.2 percent still had neutralizing antibodies above the threshold level detected six months after the second vaccination.

However, researchers are still not sure exactly how this decrease in antibodies affects the effectiveness of the drug. vaccine derived from China, because they have not yet determined the level to measure the immune response to coronavirus with Sinovac. Therefore, to define protection against the disease, one should not only base oneself on the amount of antibodies it can generate.

Another thing to consider is that samples from people who have been vaccinated with a third dose of Sinovac had an increase of 3 to 5 times antibody 28 days later.

The spokesperson for the Chinese laboratory Liu Peicheng did not exclude the possibility of applying a third dose to develop immunity against Delta variant.

Which countries apply the Sinovac vaccine?

• Mexico
• The Savior
• Dominican Republic
• Colombia
• Ecuador
• Brazil
• Chile
• Tunisia

• Albania
• Turkey
• Azerbaijan
• China
• Thailand
• Cambodia
• Malaysia
• Indonesia
• Philippines
• Uruguay