Moderna COVID-19 vaccine over 90% effective 6 months after booster shot, data shows – National


Moderna says its COVID-19 vaccine is more than 90 per cent effective against the virus at least six months after receiving a second dose.

Referencing preliminary data released Tuesday from its Phase III clinical trial, the pharmaceutical giant said in a press release its vaccine was up to 95 per cent effective against “severe cases of COVID-19.”

Moderna also said its vaccine booster geared towards variants of concern showed an increase in “neutralizing titres” against known strains of the virus. A titre is laboratory test that measures the presence and amount of antibodies in blood.

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Moderna says vaccine appears to protect against COVID-19 variants

“The new preclinical data on our variant-specific vaccine candidates give us confidence that we can proactively address emerging variants,” the press release said.

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The mRNA vaccine developer said the vaccine’s efficacy kicked in two weeks after the second dose. Data from the Phase III clinical trial evaluated over 900 cases of COVID-19 until April 9, including more than 100 severe cases of the virus.

The news comes after a study published in the New England Journal of Medicine on April 6 found antibodies produced by Moderna’s vaccine maintained a 94 per cent efficacy rate that began 180 days after the second dose.

It also comes after a week-long delay over a previously promised batch of 855,000 Moderna doses. On Monday, Maj.-Gen. Dany Fortin, the military commander leading the federal government’s vaccination distribution effort, blamed the delay on a “backlog with quality assurance.”

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COVID-19: Moderna vaccine doses arriving next week, Anand says

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Canada has pre-ordered 44 million doses of the vaccine and has already distributed more than 2 million doses across the country.

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Health Canada approved the two-dose Moderna vaccine in December of last year. It has been authorized for adults aged 18 years and older.

Moderna is in the process of testing its vaccine on children aged 17-years-old and younger.

Read more:
Real-world data shows Pfizer, Moderna vaccines highly effective after just 1 shot

The vaccine developer said its trial for those between the ages of 12 and 17 years was now “fully enrolled” with around 3,000 participants from the United States, while its paediatric trial for children aged between six months and 11 years is “currently enrolling.”

Moderna said it expects to enrol 6,750 healthy children in that age demographic into its two-part, two-dose study from Canada and the U.S. Dose levels will vary based on age. 

The pharmaceutical giant said an interim analysis will also be conducted to “determine which dose will be used in Part 2, the placebo-controlled expansion portion of the study.”

More to come. 

— with files from the Canadian Press

© 2021 Global News, a division of Corus Entertainment Inc.

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