AstraZeneca Plc’s antibody cocktail was only 33% effective at preventing Covid-19 symptoms in people who had just been exposed to the virus, failing a study that was key to the drugmaker’s pandemic push.

U.K. Prime Minister Boris Johnson pushed back his plan to lift restrictions by four weeks as the more infectious delta variant spreads, threatening to undermine the country’s effort to vaccinate its way out of the outbreak.

There was good news on the vaccine front, with two-dose shots from Pfizer Inc. and Astra proving highly effective at preventing the hospitalization of those with the delta mutation.

Singapore plans to reopen schools in stages from the end of June as vaccinations among children increase. But Indonesia tightened curbs on movement. The Philippines is keeping Manila under the second-loosest restrictions, while tightening rules in more than a dozen areas.

Key Developments:

• Global Tracker: Cases exceed 176 million; deaths pass 3.8 million
• Vaccine Tracker: More than 2.39 billion doses administered
• Pfizer, AstraZeneca shots keep delta patients out of hospital
• New York benefits most, South Dakota least from 70% vaccination
• ‘I Weep All the Time’: Trauma Lasts Beyond Covid in India
• What the world wants China to disclose in Wuhan probe
• Subscribe to a daily update on the virus from Bloomberg’s Prognosis team here.

Norway to Space Out Shots as Deliveries Slow (6:54 a.m. NY)

Norway will return to an interval of 12 weeks between first and second vaccine doses. The move comes after estimates for deliveries by Pfizer-BioNTech for the next three months were cut by about 100,000 doses a week to 200,000. The Norwegian Institute of Public Health is also considering mixing Pfizer-BioNTech and Moderna shots as the first and second doses.

Moscow Hospitalizations Soar by 70% (5:47 p.m. HK)

The number of seriously-ill patients hospitalized in Moscow has risen by 70% over the last several days, Mayor Sergei Sobyanin said, according to Interfax.

There were 6,805 new virus cases in the Russian capital on Tuesday, up 78% from a week earlier. The number of daily cases is approaching the December peak, according to the mayor, who introduced new restrictions over the weekend to limit the spread of the virus.

Germany May Exceed 50% Vaccine Threshold (5:15 p.m. HK)

Germany could surpass the threshold of administering at least one dose of vaccine to half of the population, according to Chancellery Minister Helge Braun.

“I have the feeling when I look at the statistics that today could be the day on which we surpass 50% of first shots in the German population,” Braun said at a medical forum in Berlin. “That’s a great success.”

The Health Ministry will likely update its data on Germany’s vaccination campaign to include Tuesday’s figures on Wednesday morning. Through Monday, 48.7% had received at least their first shot, and just under 27% were fully vaccinated.

Astra Antibody Cocktail Falls Short (2:30 p.m. HK)

Astra’s antibody cocktail was found to be only 33% effective at preventing symptoms in people who had been exposed to the virus, failing the study’s main goal. The trial looked at whether the long-acting antibody combination could protect people who had recently been in contact with the SARS-CoV-2 virus in places like care homes.

The drugmaker said it’s running other studies of the medicine that could help clarify the findings. The outcome is a blow to Astra for a drug that was hoped to be a bright spot in its pandemic efforts following the mixed success of its vaccine with the University of Oxford.

Medigen Plans Vietnam, Paraguay Trials (2:25 p.m. HK)

Taiwan’s Medigen Vaccine Biologics Corp. plans to launch clinical trials of its vaccine after it signed a memorandum of understanding with Vietnam’s National Institute of Hygiene and Epidemiology and the medical sciences school of Paraguay’s National University of Asuncion, the company said. Medigen also plans to talk with Southeast Asian countries about research and development as well as business cooperation.

Malaysia Clears Pfizer Shot for 12 and Over (2:15 p.m. HK)

Malaysia’s Drug Control Authority approved the use of the Pfizer-BioNTech vaccine for those aged 12 and older. It also granted conditional clearance for the single-dose vaccines made by CanSino Biologics Inc. and Johnson & Johnson.

Turkey Offers Shots to Public, Private Workers (1:20 p.m. HK)

Turkey’s health minister said on Twitter that everyone registered as an employee at Turkish companies and all public servants can now book an appointment to get vaccinated.

Turkey vaccinated around 842,494 people on Monday, bringing the total amount of doses administered to 34.6 million, according to official data. Out of those, 20.8 million people received at least one shot of the vaccine.

Singapore Plans to Open Schools in Stages (9:02 a.m. HK)

Singapore, one of the first countries to authorize the use of the Pfizer-BioNTech vaccine for children aged 12 and above, plans to resume face-to-face instruction in schools on a staggered bases from June 28.

Almost 90% of students have signed up for vaccinations, and one in three have had their first dose, Education Minister Chan Chun Sing said in a Facebook post on Monday. “Going forward, we must combine vaccination with increased testing and rapid isolation of potential infection clusters to keep our schools open and safe.”

— With assistance by Marthe Fourcade, Janice Kew, Go Onomitsu, Siegfrid Alegado, Andreo Calonzo, Kwan Wei Kevin Tan, Arys Aditya, Isabel Reynolds, Anisah Shukry, Cindy Wang, Suzi Ring, Iain Rogers, Jake Rudnitsky, and Stephen Treloar