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CORONAVIRUS

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Should You Get a Booster?Canada Border Q&AInternational TravelVaccine Mandate
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 * Earnings


MODERNA CUTS COVID-19 VACCINE SALES FORECAST FOR 2021


COMPANY’S THIRD-QUARTER EARNINGS FELL SHORT OF ESTIMATES AS IT RAMPS UP FOR
BOOSTER SHOTS

Covid Vaccine Efficacy Numbers, Explained
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Covid Vaccine Efficacy Numbers, Explained

Recent studies have shown that the effectiveness of Covid-19 vaccines is
decreasing, though experts say the shots still work well. WSJ explains what the
numbers mean and why they don’t tell the full story. Photo illustration: Jacob
Reynolds/WSJ
By
Peter Loftus
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PETER LOFTUS

 * Biography
 * @Loftus
 * Peter.Loftus@dowjones.com

and
Matt Grossman
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MATT GROSSMAN

 * Biography
 * @mattgrossman
 * matt.grossman@wsj.com

Updated Nov. 4, 2021 11:40 am ET

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Moderna Inc. has encountered supply challenges for its Covid-19 vaccine,
resulting in lower-than-expected sales for the latest quarter and a reduced
forecast of dose deliveries and sales for the full year.

The Cambridge, Mass., company cited the complexities of shipping its vaccine
doses to more countries, compared with delivering the vaccine during the initial
rollout in the U.S. and a handful of other countries.

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