Oct 6: The effectiveness of the Pfizer Inc (PFE.N)/BioNTech SE vaccine in preventing infection by the coronavirus dropped to 47% from 88% six months after the second dose, according to data published on Monday that U.S. health agencies considered when deciding on the need for booster shots.

Those who are fully vaccinated are found to have developed 90 percent antibodies against COVID-19 while this was 80 percent among those receiving their first dose only.

LONDON, May 23: A double dose of COVID-19 vaccines is almost as effective against the fast-spreading variant of the coronavirus first identified in India as it is against Britain’s dominant strain, English health officials said on Saturday.

BEIJING, April 11: In a rare admission of the weakness of Chinese coronavirus vaccines, the country’s top disease control official says their effectiveness is low and the government is considering mixing them to give them a boost.

USA, March 25: AstraZeneca insisted Wednesday that its COVID-19 vaccine is strongly effective even after counting additional illnesses in its disputed U.S. study, the latest in an extraordinary public rift with American officials.

LONDON, Dec 28: The head of drugmaker AstraZeneca, which is developing a coronavirus vaccine widely expected to be approved by U.K. authorities this week, said Sunday that researchers believe the shot will be effective against a new variant of the virus driving a rapid surge in infections in Britain.

TAIPEI, Taiwan, Dec 25: With rich countries snapping up supplies of COVID-19 vaccines, some parts of the world may have to rely on Chinese-developed shots to try to conquer the outbreak. The question: Will they work?

KATHMANDU, July 6: Taking a leadership role in ensuring the effectiveness of the foreign aid which reaches the underdeveloped countries, Nepal is co-hosting a side event ahead of the Senior Level Meeting (SLM) of Global Partnership for Effective Development Cooperation (GPEDC) in New York.

KATHMANDU, Oct 24: A majority government seems well within the reach of the newly-formed left alliance. It is something even the staunchest Nepali Congress supporter can't easily rule out, given the strong performance of the left parties in the recently held local polls.

KATHMANDU, Sept 29: Prime Minister Pushpa Kamal Dahal inaugurated the SAARC Effectiveness Conference here today.