JERUSALEM — Pfizer, Inc. Chief Executive Albert Bourla said on Saturday that an annual coronavirus disease 2019 (COVID-19) vaccine would be preferable to more frequent booster shots in fighting the coronavirus pandemic.

Pfizer/BioNtech’s COVID-19 vaccine has shown to be effective against severe disease and death caused by the heavily-mutated Omicron variant but less effective in preventing transmission.

With cases soaring, some countries have expanded COVID-19 vaccine booster programs or shortened the gap between shots as governments scramble to shore up protection.

In an interview with Israel’s N12 News, Mr. Bourla was asked whether he sees booster shots being administered every four to five months on a regular basis.

“This will not be a good scenario. What I’m hoping (is) that we will have a vaccine that you will have to do once a year,” Mr. Bourla said.

“Once a year — it is easier to convince people to do it. It is easier for people to remember.

“So from a public health perspective, it is an ideal situation. We are looking to see if we can create a vaccine that covers Omicron and doesn’t forget the other variants and that could be a solution,” Mr. Bourla said.

Mr. Bourla has said Pfizer could be ready to file for approval for a redesigned vaccine to fight Omicron, and mass produce it, as soon as March.

Citing three studies, the US Centers for Disease Control and Prevention (CDC) said on Friday that a third dose of an mRNA vaccine is key to fighting Omicron, providing 90% protection against hospitalization.

A preliminary study published by Israel’s Sheba Medical Center on Monday found that a fourth shot increases antibodies to even higher levels than the third but was likely not enough to fend off Omicron. Nonetheless, a second booster was still advised for risk groups, Sheba said. — Reuters

SYDNEY — New Zealand Prime Minister Jacinda Ardern has canceled her wedding as the nation imposes new restrictions to slow the community spread of the COVID-19 Omicron variant, she told reporters on Sunday.

New Zealand will impose mask rules and limit gathering from midnight on Sunday after a cluster of nine COVID-19 Omicron cases showed community spread from the North to South islands after a wedding.

A family returned to Nelson in the South Island by plane after attending a wedding and other events in Auckland in the North Island. The family and a flight attendant tested positive.

New Zealand will move to a red setting under its COVID-19 protection framework, with more mask wearing. Indoor hospitality settings such as bars and restaurants and events like weddings will be capped at 100 people. The limit is lowered to 25 people if venues are not using vaccine passes, Ms. Ardern said.

“My wedding will not be going ahead,” she told reporters, adding she was sorry for anyone caught up in a similar scenario. Ardern had not disclosed her wedding date, but it was rumored to be imminent.

Asked by reporters how she felt about the cancellation of her wedding to longtime partner and fishing-show host Clarke Gayford, Ms. Ardern replied: “Such is life.”

She added, “I am no different to, dare I say it, thousands of other New Zealanders who have had much more devastating impacts felt by the pandemic, the most gutting of which is the inability to be with a loved one sometimes when they are gravely ill. That will far, far outstrip any sadness I experience.”

New Zealand’s borders have been shut to foreigners since March 2020. The government pushed back plans for a phased reopening from mid-January to the end of February out of concern about a potential Omicron outbreak as in neighboring Australia.

People able to travel to New Zealand under narrow exceptions must apply to stay at state-managed quarantine facilities. The government last week stopped issuing any new slots amid a surge in the number of people arriving with Omicron.

About 94% of New Zealand’s population over the age of 12 is fully vaccinated and about 56% of those eligible have had booster shots. — Reuters