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NPR事实核查：中国国产新冠疫苗有效性究竟如何？
中国新冠感染实际死亡人数以及感染激增的总体影响，很大程度上取决于一个关键因素：中国疫苗的效果如何。
Polio found in U.K. for the first time in nearly 40 years. Here’s what it means
Scientists in Britain have detected multiple versions of the virus in wastewater. Officials say the risk to the public is extremely low and urge people to ensure their polio vaccines are up to date.
Will COVID-19 Vaccines Still Work Against The Variant From India?
A coronavirus variant is spreading quickly in India, causing a massive surge in cases. Scientists are rushing to see if vaccines will be effective against this variant. So far, the news is hopeful.
How Rich Countries Are ‘Hoarding’ The World’s Vaccines, In Charts
Experts say low-risk people in the U.S. will likely be immunized before many high-risk people in poor countries.
Why Does A Virus Cause Problems In One Region But Not Another? A Study Offers Insight
In 2015, the mosquito-borne virus Zika exploded in South America. Health experts predicted it would erupt in Africa. But a major outbreak never happened. Now scientists think they understand why.
Dengue Vaccine Controversy In The Philippines
A dengue vaccine put thousands of kids at risk for a deadly disorder. Some scientists says the manufacturer did too little to warn parents in the Philippines.
Can’t Get Comfortable In Your Chair? Here’s What You Can Do
Chair design shifted dramatically about a hundred years ago, and it hasn’t been good for our backs. Our daily lives are filled with chairs that make our posture worse. Luckily, we’ve got hacks.
