Zoom shares fall by 15 percent after success of Pfizer's coronavirus vaccine
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The shares of the Zoom video conferencing app, that rose significantly amid the coronavirus crisis, took a hit after Pfizer announced that its Covid-19 vaccine has proven to be 90 percent effective in building immunity. The shares of Zoom fell by 15 percent after the announcement by Pfizer. The shares of the firm fell back to the September 2020 level. The app had a record 200 million daily users in March.