Coronavirus: Moderna says its vaccine remains 93 per cent effective 4 to 6 months after second dose

The latest result shows hardly any change from the 94 per cent efficacy reported in its original clinical trial
A durable vaccine could mean recipients may be able to wait longer between shots if they do eventually need a booster, or may even not need additional doses

Coronavirus pandemic

Reuters

Published: 7:50pm, 5 Aug 2021

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Moderna on Thursday said its Covid-19 vaccine shot was about 93 per cent effective four to six months after the second dose, showing hardly any change from the 94 per cent efficacy reported in its original clinical trial.

That compares favourably to data released last week by rivals Pfizer and BioNTech, in which they suggested their vaccine’s efficacy waned around 6 per cent every two months, declining to around 84 per cent six months after the second shot.

Both the Moderna and Pfizer-BioNTech vaccines are based on messenger RNA (mRNA) technology.

“We are very pleased that our Covid-19 vaccine efficacy is stable at 93 per cent from four to six months,” Moderna’s CEO Stéphane Bancel said in a statement. “This strong duration will benefit the hundreds of millions of people who have been dosed to date with Moderna vaccines.”

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Moderna posted second-quarter sales of US$4.4 billion, slightly above an average estimate of US$4.2 billion drawn from 10 analysts polled by Refinitiv. Its Covid-19 shot is the firm’s first authorised product and sales were just US$67 million in the same period last year.

The company logged US$2.78 billion in net income in the quarter or US$6.46 a share, beating expectations of US$2.46 billion or US$5.96 a share.

A durable vaccine could mean recipients may be able to wait longer between shots if they do eventually need a booster or may even not need additional doses to prevent Covid-19.

Public health authorities around the world grappling with the highly transmissible Delta variant are debating whether additional doses of Covid-19 vaccines are safe, effective and necessary.

Pfizer plans to ask for authorisation for a third shot of its vaccine later this month, and some countries – like Israel – have already begun or plan to soon begin administering shots to older or otherwise vulnerable people.

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Moderna said its ongoing studies of three different booster candidates induced robust antibody responses against important variants of concern.

These included the Gamma, Beta and Delta variants which were first identified in Brazil, South Africa and India, respectively.

It said neutralising antibody levels following the boost approached those observed after the second shot of its vaccine.

A worker unloads boxes of Moderna’s Covid-19 at the Soekarno Hatta Airport in Tangerang, Indonesia. Photo: Antara Foto via Reuters

For this year, Moderna has signed US$20 billion worth of sales and expects to be able to produce between 800 million and 1 billion doses of the vaccine.

It has agreements for US$12 billion in 2022, with options for another roughly US$8 billion. It expects to be able to produce between 2 and 3 billion doses next year.

The company has not been able to keep pace with the production of much larger rival Pfizer, which expects to produce as many as 3 billion vaccine doses this year, and expects 2021 sales of the vaccine it developed with BioNTech to top US$33.5 billion.

Moderna’s vaccine was authorised for emergency use in adults in the US in December and has since been cleared for emergency or conditional use in adults in more than 50 countries.

The company started the process of filing for full approval with the US Food and Drug Administration in June and expects to finish its submission in August.