‘Simple is beautiful’: One-shot vaccine proves effective
The first one-shot COVID-19 vaccine provides good protection against the illness, Johnson & Johnson reported in a key study released Friday, offering the world a potentially important new tool as it races to stay ahead of the rapidly mutating virus.
The pharmaceutical giant’s preliminary findings suggest the single-dose option may not be as strong as Pfizer’s or Moderna’s two-dose formula, and was markedly weaker against a worrisome mutated version of the virus in South Africa.
But amid a rocky start to vaccinations worldwide, that may be an acceptable trade-off to get more people inoculated faster with an easier-to-handle shot that, unlike rival vaccines that must be kept frozen, can last months in the refrigerator.
“Frankly, simple is beautiful,” said Dr. Matt Hepburn, the U.S. government’s COVID-19 vaccine response leader.
J&J plans to seek emergency use authorization in the U.S. within a week. It expects to supply 100 million doses to the U.S. by June – and a billion doses globally by year’s end – but declined to say how much could be ready if the Food and Drug Administration gives the green light.
Defeating the scourge that has killed more than 2 million people worldwide will require vaccinating billions. The shots being rolled out in different countries so far all require two doses a few weeks apart for full protection. Nearly 23 million Americans have received a first dose of Pfizer or Moderna shots since vaccinations began last month, but fewer than 5 million have gotten their second dose.
Also Friday, regulators cleared a third option, AstraZeneca’s vaccine, for use throughout the European Union. The decision came amid criticism that the 27-nation bloc is not moving fast enough, as well as concern that there’s not enough data to tell how well the vaccine works in older people.
J&J studied its one-dose option in 44,000 people in the U.S., Latin America and South Africa. Interim results found the shot 66% effective overall at preventing moderate to severe COVID-19, and much more protective – 85% – against the most serious symptoms. There were no serious side effects.
“Gambling on one dose was certainly
worthwhile,” Dr. Mathai Mammen, global research chief for J&J’s Janssen Pharmaceutical unit, told The Associated Press.
The vaccine worked better in the U.S. – 72% effective against moderate to severe COVID-19 – compared with 66% in Latin America and 57% in South Africa, where a more contagious mutant virus is spreading.
The reduced protection against that mutation is “really a wake-up call,” said Dr. Anthony Fauci, the top U.S. infectious-disease expert.
The more the virus is allowed to spread, the more opportunities it has to mutate. Vaccine makers are looking into how to alter their shots if necessary.
For now, the findings are an incentive “to vaccinate as many people as we possibly can,” Fauci
stressed.
Data is mixed on how well other vaccines being used around the world work, but the Pfizer and Moderna shots were 95% protective in large U.S. studies.
It’s not fair to compare studies done before the record surges of recent months and discovery of new mutants – they might not turn out the same today, cautioned Dr.
VACCINE/B3