COVID-19 antibodies: immune cells found active 9 months after Italian city tested positive for SARS-CoV-2
In 9 months, the University of Padua in Italy and Imperial College London were able to test more than 85% of the Vo population, the Italian population, for active COVID-19 antibodies. The 3,000 residents of the Italian city have become strong evidence for the presence of antibodies to COVID-19, whether or not an individual shows symptoms.
Effect of the COVID-19 pandemic in Vo, Italy
(Photo: Davi Pimentel / Pexels)
Vo is a city in Italy that had the highest rate of population infected with COVID-19. More than 80% of the city had tested positive with the virus just after the start of the pandemic. The study, published in the journal Nature Communication, titled “Dynamics and transmission of SARS-CoV-2 antibodies from community-wide serological tests in the Italian municipality of Vo ‘”, shows that the antibodies on the affected residents were active from February to November 2020.
The antibodies, based on the study, saw their levels decrease over the specified 9 months. However, the levels of these immune cells proven to fight COVID-19 were not different between people who had symptoms and those who were asymptomatic.
Imperial College London MRC Center for Global Infectious Disease Analysis expert and study co-author Ilaria Dorigatti said they found no evidence of the difference between COVID-19 antibody levels individuals who had symptoms and the group who did not.
The COVID-19 antibody research presented the results of blood samples observed with the help of 85% of the citizens of Vo. The antibodies were examined by the neutralization test technique, which determined the types of immune cells reacting to SARS-CoV-2. The rate of antibody decay depends on the test used during the exam, and with that, certain types of antibodies showed a drop in their rate between November 7 and November, reports UPI.
The examination also found that antibody levels in some subjects increased throughout the 9 months of observation. According to the study, this could be potential evidence of reinfection. Raising antibody levels is a normal reaction of the immune system whenever more protection for the body is needed, and this process is exhibited by our body not only with COVID-19 but also with other diseases.
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COVID-19 reinfection vs antibody at 9 months and vaccine immunity
Reinfection with COVID-19 is a risk that can happen to anyone infected with the virus before, but a study published in the journal JAMA Internal Medicine, titled “Association of SARS-CoV-2 Seropositive Antibody Test With Risk of Future Infection” confirms that patients who have recovered from coronavirus are protected within 3 months against reinfection.
In addition, the journal’s research Nature, titled “SARS-CoV-2 mRNA vaccines induce persistent human germinal center responses,” indicates that the immunity provided by COVID-19 vaccines such as Moderna and Pfizer-BioNTech variants could last for years.
Dorigatti stressed that the pandemic is not over yet, even in Italy or in other countries. The most essential measure right now is to implement the 2 doses of the COVID-19 vaccine and improve surveillance of those affected through contact tracing.
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