中國將疫苗接種率從 70% 提高到 85%，因為其疫苗的有效性受到質疑

Recently Yahoo new on-line reported the following:

China increased its threshold for herd immunity from 70% vaccinated to 85% as the efficacy of its shots comes into question

Marianne Guenot

Wed., June 23, 2021, 4:27 a.m.

Business Insider

China will likely have to fully vaccinate 80 to 85% of its population to reach herd immunity, a top China health official said.

The estimate is a significant increase on prior projections, suggesting that defeating COVID-19 is proving harder than China expected.

Shao Yiming, a spokesperson for the China Center for Disease Control and Prevention, made the announcement on Monday after China administered more than a billion doses of vaccine, the South China Morning Post reported.

More than 2.2 billion doses would be needed to reach that level of coverage in China, Shao said.

The news comes as cases of COVID-19 have been surging in countries heavily vaccinated with Chinese vaccines Sinopharm and Sinovac, prompting questions about how well the shots work.

China previously said that 70% coverage of the population should be vaccinated to reach herd immunity, The New York Times reported.

Experts generally agree that 70 to 85% of the population has to be vaccinated to reach herd immunity.

China has approved four vaccines, all of which were developed domestically. Two have been given emergency approval by the World Health Organisation (WHO).

Here are the reported efficacies for each vaccine against symptomatic disease:

Sinovac Coronavac: 51%, according to the WHO.

Sinopharm BIBP: 79%, according to the WHO.

Sinopharm WIV04: 72% according to published data.

CanSino Biologics' vaccine: 68% according to interim data, which has not been peer-reviewed.

Translation

一位中國高級衛生官員表示，中國可能必須對其 80% 至 85% 的人口進行全面接種才能達到群體免疫。

該估計比之前的預測顯著增加，這表明打敗 COVID-19 的難度比中國預期的要大。

據《南華早報》報導，中國疾病預防控制中心發言人邵一鳴週一在中國接種了超過 10 億劑疫苗後宣布了這一消息。

邵說，要在中國達到這種覆蓋水平，需要超過 22 億劑。

在這消息傳出之際，正值有大量接種中國疫苗國藥集團和科興的國家, 其COVID-19 病例正在激增，引發了人們對疫苗的效果是如何的質疑。

據《紐約時報》報導，中國此前曾表示，應為 70% 的人口接種疫苗，以實現群體免疫。

專家普遍認為，70% 到 85% 的人口必須接種疫苗才能達到群體免疫。

中國已經批准了四種疫苗，都是在國內開發的。其中兩個已獲得世界衛生組織（WHO）的緊急批准。

以下是針對有症狀疾病的每種疫苗的報告功效：

科興疫苗：51%，據世界衛生組織稱。

國藥 BIBP疫苗：79%，根據世界衛生組織。

國藥 WIV04疫苗：72% 根據公佈的數據。

CanSino Biologics 疫苗： 68%, 根據尚未經過同行評審的中期數據。

              So, the efficacy of vaccines used in China are generally lower than those used in the US, Canada and the UK.