However, in two different dose regimens, the vaccine's efficacy was 90 per cent in one and 62 per cent in the other.
Five images from last week's action in Europe for you to savour.
Buried in a Kolkata cemetery is an Englishman who served India well during her struggle for freedom. Charles Freer Andrews was a benevolent force that neither the Indians, nor the British could ignore.
Backing the 12-16 weeks gap between the two doses of Covishield in the country, the chief investigator of the AstraZeneca vaccine clinical trials on Friday said that the level of protection provided by one dose of the preventive significantly increases in the second and third months after the jab.
Known as one of the most brilliant theoretical physicists since Albert Einstein, here are a few glimpses of Stephen Hawking's life.
Air travel by the top 20 footballers nominated for the 2019 Ballon d'Or was responsible for producing 505 tonnes of carbon dioxide (CO2) emissions this year alone, according to a climate change researcher.
The rule states that no personal messages are allowed on apparel or sporting gears and even Chris Gayle wasn't allowed to use Universe Boss Logo on his bat for same reason.
The 74-year-old real estate mogul-turned politician, who radically changed politics in the corridors of power in Washington, DC over the past four tumultuous years, was impeached for a second time on the charges of 'incitement of insurrection' for the violent storming of the United States Capitol by his supporters just days before the end of his four-year term.
Natasha Uttamsingh wanted to keep Aakash Andrews in her life when he decided to break up with her, Guildford Crown Court in Surrey was told this week.
Here we encapsulate all the sporting action from last week in this stunning photo feature.
Alleging that the candidate vaccine was not safe, he has also sought cancelling approval for its testing, 'manufacture and distribution', failing which legal action would be taken.
The 27-year-old younger daughter of Prince Andrew, Duke of York -- the monarch's younger son -- and Sarah, Duchess of York, will marry her nightclub manager boyfriend later this year at St George's Chapel in Windsor Castle, the same venue as Prince Harry and Meghan Markle's wedding on May 19.
WNBA Commissioner Cathy Engelbert has pushed back on suggestions that the pandemic would set the sport back.
Amid deepening concerns in China over the regrouping of the ETIM, blamed by Beijing for all the violent attacks in its volatile Xinjiang province and elsewhere in the country, Foreign Minister Wang Yi met Mullah Baradar at Tianjin and sought to prevail on him to build a 'positive image and establish a broad and inclusive political structure that suits Afghanistan's national realities'.
The Oxford vaccine, which also has a tie-up with the Serum Institute of India, was first administered to Brian Pinker, an 82-year-old Oxford-born dialysis patient. Pinker is among the first to be vaccinated by the Oxford University Hospital's (OUH) chief nurse, hailed as a major milestone in the phased vaccination programme being undertaken by the National Health Service (NHS).
Pets not only keep you active they can also make you feel and act younger, a new study has found.
The British-Swedish pharmaceutical major and the UK's medicines regulator said that the vaccines produced by Oxford University in collaboration with AstraZeneca to protect against COVID-19 are safe.
The winners will split an eight million Swedish kronor (USD 924,000) award funded by the Swedish central bank.
What happens when sparks fly on a film set, away from the prying eyes of cameras? Take a look!
'It's official: we won. I'm going to Albany to fight to tax the rich, heal the sick, house the poor & build a socialist New York. But I can't do it alone. To win socialism, we'll need a mass movement of the multiracial working class as well. So let's build one,' Mamdani tweeted.
Australia's former national selector Mark Waugh also picked the Kane Williamson-led New Zealand for their ability to perform well in all departments.
"Thanks to the profound commitment of our citizens, we have flattened the curve and countless American lives have been saved. Our country is now in the next stage of the battle. A very safe, phased and gradual reopening of our country," Trump said.
Imagine a world in which a human only thinks, and a robot cooks the whole meal.
Google paid million of dollars as bonus to retain him when competitors tried to poach.
The report added that there is no indication that the virus played any role in his death.
'The more you love yourself, the prettier you feel inside and the prettier you will be.'
Dr Vivek H Murthy, the next surgeon general of the United States, wonders whether social media is worsening one of the biggest problems in the world today -- loneliness.
The QS World Grad School Tour offers an opportunity for potential graduate candidates to meet admissions officers of the world's top universities.
The academic session will go till June and schools re-open around September for the next session.
Biden and Harris are the leaders we need at this time to do the painful but necessary work of creating a more inclusive -- and united -- nation, points out Murali Kamma.
'It will be normal, regular, everyday politics whether you like it or not.' That's what this country needs,' a New Yorker tells Payal Singh Mohanka.
Premji, 70, who founded the Azim Premji Foundation, is among the nine philanthropists named recipients of the 2017 Carnegie Medal of Philanthropy in "recognition of their outstanding and innovative leadership in philanthropy."
This is the most fun Sukanya Verma has had since Wonder Woman.
Chen scores world record for massive lead over shocked Hanyu
The film is named after a song from the late Akkineni Nageswara's film Raamudu Kaadu Krishnudu.
Wealth may drive your relationship preferences says study.
Archer, who has played his junior cricket in the Caribbean and qualified to play for England only in April, is a familiar figure for the West Indies camp and it knows what the 24-year-old is capable of.
Xanda, a six-year-old male, was killed just outside Hwange National Park in north west Zimbabwe -- near the spot where Cecil died two years ago.
'Acting, by definition, is a portrayal of a character other than oneself.' 'If every role is to be played only by someone answering to that precise description, most professional actors -- of all ethnicities and genders -- would be out of a job,' observes Indira Kannan.
Selfies, Koalas and hugs: Modi's Down Under visit
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