A study conducted in Hong Kong on more than a thousand patients shows that the Coronavac vaccine, developed by the Chinese laboratory Sinovac, causes the production of ten times less antibodies than the vaccine developed by BioNTech and produced by Pfizer.
This comparison between the two vaccines available in Hong Kong was conducted by researchers at the University of Hong Kong on 1,442 health workers who received two doses of these vaccines.
Published in the medical journal The Lancet Microbe on July 15, the article specifies that the quantity of antibodies is not sufficient to assess the level of immunity conferred by a vaccine, but that “the differences in the concentrations of neutralizing antibodies identified in our study could result in substantial differences in vaccine efficacy ”. The researchers add that patients who received Coronavac show similar antibody levels to patients who contracted Covid-19 and are cured.
The highest ever daily country case figure for coronavirus on Planet Earth was recorded in The Seychelles in May 2021. The Seychelles daily case figure, adjusted for population, reached an astonishing 4,083 cases per million.
What is also surprising is that many of the countries on the list with the highest daily case rates also have excellent vaccination rates (see below). The Seychelles, for example, has vaccinated more than 60% of its population.
The reasons behind some of the high daily case numbers are given in articles we have previously published and have linked to below.
Covid-19 cases in The Seychelles, where 57% of the population have been fully inoculated with Sinopharm shots, increased to 2,486 people – 37 per cent of whom have had two doses of the vaccine.
Sinopharm vaccine shots were issued to 57 per cent of those who were fully inoculated and the rest with Covishield, a vaccine made in India under a licence from AstraZeneca Plc. As of May 8th no one who had contracted Covid-19 while being vaccinated had died
The Seychelles, which has fully vaccinated over 60% of its population against Covid-19, is bringing back restrictions amid a rise in cases. The archipelago of nearly 100,000 people recorded close to 500 new cases in the three days to 1 May and has about 1,000 active cases. A third of the active cases involved people who have had two vaccine doses, the country’s news agency said. The rest had either had a single dose or were unvaccinated.
There are currently 1,068 active Covid cases in the Seychelles, of which a third have been detected in people given two doses of either AstraZeneca’s or China’s Sinopharm’s vaccine. It unclear what has triggered the surge in cases but testing has detected the South African variant spreading on the islands. (Daily Mail report)
Graph courtesy of Ourworldindata.org