WASHINGTON (REUTERS) - Novavax Inc's Covid-19 vaccine could be cleared for use in the United States as soon as May if US regulators authorise it based on data from the company's British trial, which could be completed "in the coming weeks", its chief executive said on Monday (March 1).
However, chief executive Stanley Erck added that talks with the US Food and Drug Administration are ongoing and the agency may require Novavax to submit data from its US trial, which could take an additional two months to complete, pushing back US clearance to mid-summer.
Novavax shares were off 5.6 per cent at US$226.85 in extended trading after initially rising following release of its quarterly results. The shares have soared about 2,400 per centfrom US$9.82 on Jan 21, 2020, when the company announced it was developing a vaccine against the coronavirus.
Preliminary data from its UK trial released in January showed the vaccine to be around 96 per cent effective against the original version of the coronavirus and around 86 per cent effective against the now widely circulating variant first discovered in Britain.
Novavax can already manufacture its shots at scale and will be able to have tens of millions of doses stockpiled and ready to ship in the United States when it receives authorisation, Chief Executive Stanley Erck said.
"It will be substantial - in the many tens of millions or a hundred million," Mr Erck said in an interview.
Novavax had promised to deliver 110 million doses to the US government by the end of the third quarter. That could happen as early as July, Mr Erck said.
Novavax's vaccine production plants should all be fully functional by April, said Novavax research chief Gregory Glenn on a conference call after the company reported quarterly results.
"In April, May, June, we should be finishing filling and finishing product in advance of regulatory approvals,"Mr Glenn said.
In late January, Mr Erck said he expected it would take several weeks for Novavax to file UK trial data with regulators in the United Kingdom, Europe and elsewhere.
Novavax could produce up to 150 million doses per month by May or June, he had added in January in an interview.
The Novavax shot, if authorised, would add to the vaccine options for millions of Americans awaiting immunisation against the coronavirus.
Johnson & Johnson's one-dose vaccine on Saturday became the third to win US emergency use authorisation (EUA).
Vaccines produced by Pfizer Inc with partner BioNTech and Moderna Inc received EUAs in December.
Novavax's vaccine is a two-dose regimen like Pfizer's and Moderna's, but is easier to ship as it can be stored at refrigerator temperatures, rather than frozen.
Novavax promised to deliver doses to the United States after it was awarded US$1.6 billion (S$2.12 billion) to help finance research, development and production of a Covid-19 vaccine.
Novavax completed enrollment of its 30,000-subject US-based trial in February.