العربية نت. Explainer: Are Chinese COVID

The lack of detailed data on the Chinese vaccines against the Delta has hobbled any meaningful peer reviews by foreign experts The cities also required those travelling out of the province to show proof of negative COVID-19 test results
Two doses of the AstraZeneca vaccine were 60 percent effective against symptomatic disease from the Delta compared with 66 percent effectiveness against the Alpha, PHE said He said a booster shot following the two dose-based regimen could quickly elicit stronger and more durable antibody reaction against the Delta

Guangdong, which has 126 million people, has fast-tracked its vaccination effort since the outbreak.

Explainer: Are Chinese COVID
Antibodies triggered by two Chinese vaccines are less effective against the Delta compared with other variants, Feng Zijian, former deputy director at the Chinese Center for Disease Control and Prevention, told state media last week
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Guangzhou, Shenzhen and Dongguan quickly sealed off neighborhoods where those who were infected and their contacts visited and launched multiple rounds of mass testing, following the protocols observed during previous outbreaks
Explainer: Are Chinese COVID
A health worker prepares a dose of Sinovac's CoronaVac coronavirus disease COVID-19 vaccine, during a mass vaccination program in Apodaca, on the outskirts of Monterrey, Mexico May 25, 2021
All severe cases are from unvaccinated people
Sinovac spokesman Liu Peicheng told Reuters preliminary results based on blood samples from those vaccinated with its shot showed a three-fold reduction in neutralizing effect against the Delta

3 million people in Guangzhou city would have been infected in the first 20 to 30 days after the initial case.

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AP What China has done? Many countries from China to Indonesia and Brazil rely heavily on Chinese vaccines to inoculate their people against COVID-19, but there are growing concerns about whether they provide enough protection against , first identified in India
Explainer: Are Chinese COVID
A study by Public Health England PHE found in May the against symptomatic disease from the Delta two weeks after the second dose
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It had administered just 39