“New York City-based drug company Pfizer made the announcement on 9 November. It offers the first compelling evidence that a vaccine can prevent COVID-19 — and bodes well for other COVID-19 vaccines in development. But the information released at this early stage does not answer key questions that will determine whether the Pfizer vaccine, and … Continue reading POST 64. November 10, 2020. CORONAVIRUS. “It works! Scientists have greeted with cautious optimism a press release declaring positive interim results from a coronavirus vaccine phase III trial — the first to report on the final round of human testing.”