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Over 40% of COVID-19 vaccines are in the first phase of clinical trials
Is COVID-19 vaccinated at the end of the year at the earliest? Over 40% are still in the first phase of clinical trials. According to the statistics of the World Health Organization, as of November 12th, au moins 48 candidate vaccines for COVID-19 pneumonia have entered clinical trials worldwide. Among them, the first stage is the most, accounting for 43.75%. …
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