A new Brazilian trial of one of China’s COVID-19 vaccines found that the treatment was only effective about 50 percent of the time. The CoronaVac vaccine was developed by China’s Sinovac Biotech company. On Tuesday, researchers said a new late-stage trial in Brazil showed the vaccine was just 50.4 percent effective at preventing symptomatic infections. The Brazilian trial included data on what the researchers called “very mild” COVID-19 cases. Last week, researchers said the vaccine had performed with 78 percent effectiveness against “mild to severe” cases. CoronaVac is one of several vaccines being developed by Chinese companies.
Title: New Trial Results Show Chinese Vaccine only 50 Percent Effective
Content: <div id='article-page'><div id='article-content' data-media-url='//news-app-staging.s3.amazonaws.com' data-base-url='//news-app-staging.herokuapp.com' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/C.wav' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='New Trial Results Show Chinese Vaccine only 50 Percent Effective' data-article-id='5323'><script src='//news-app-staging.herokuapp.com/javascripts/getscripts.js'></script><link rel='stylesheet' href='//news-app-staging.herokuapp.com/stylesheets/article.css' type='text/css' /><div class='article'><p><span data-start-time='0' data-end-time='14417'>A new Brazilian trial of one of China’s COVID-19 vaccines found that the treatment was only effective about 50 percent of the time.</span> <span data-start-time='14417' data-end-time='22750'>The CoronaVac vaccine was developed by China’s Sinovac Biotech company.</span> <span data-start-time='22750' data-end-time='40583'>On Tuesday, researchers said a new late-stage trial in Brazil showed the vaccine was just 50.4 percent effective at preventing symptomatic infections.</span> <span data-start-time='40583' data-end-time='51583'>The Brazilian trial included data on what the researchers called “very mild” COVID-19 cases.</span> <span data-start-time='51583' data-end-time='64396'>Last week, researchers said the vaccine had performed with 78 percent effectiveness against “mild to severe” cases.</span> <span data-start-time='64396' data-end-time='71417'>CoronaVac is one of several vaccines being developed by Chinese companies.</span> </p></div><div class='control-buttons-sticky' style='display:none;'><div class='control-buttons'><button title='Back' class='back' disabled='disabled'></button><button title='Play' class='play' disabled='disabled'></button><button title='Pause' class='pause' style='display:none;'></button><button title='Forward' class='forward' disabled='disabled'></button><button class='finished-reading' style='display:none;'>Done</button></div></div></div><div id='article-media'><div id='media-image'><img src='https://news-app-production.s3.amazonaws.com/articles/4798/C.jpg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=16605 data-hint-location='22750' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/what_country_conducted_a_new_latestage_trial_of_a_covid19_vaccine_developed_in_china.wav'>What country conducted a new late-stage trial of a COVID-19 vaccine developed in China?</div><div class='choices' data-correct-choice='Brazil'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/venezuela.wav'><span>Venezuela</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/brazil.wav'><span>Brazil</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/portugal.wav'><span>Portugal</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/united_states.wav'><span>United States</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=16606 data-hint-location='0' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/how_effective_was_the_chinese_covid16_vaccine_during_the_brazilian_trial.wav'>How effective was the Chinese COVID-16 vaccine during the Brazilian trial?</div><div class='choices' data-correct-choice='50 percent'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/80_percent.wav'><span>80 percent</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/50_percent.wav'><span>50 percent</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/10_percent.wav'><span>10 percent</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/100_percent.wav'><span>100 percent</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=16607 data-hint-location='64396' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/coronavac_is_one_of_several_vaccines_being_developed_by__blank_.wav'>CoronaVac is one of several vaccines being developed by <span class='blank'>Chinese companies</span>.</div><div class='choices' data-correct-choice='Chinese companies'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/multinational_cooperatives.wav'><span>Multinational cooperatives</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/chinese_companies.wav'><span>Chinese companies</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/south_american_doctors.wav'><span>South American doctors</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/4798/american_companies.wav'><span>American companies</span></div></div></div><div class='question-buttons'><button class='skip-button'></button><button class='hint-button'></button><button class='speak-button'></button></div></div></div>
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