Final clinical trials for a coronavirus vaccine, developed by AstraZeneca and Oxford University, have been put on hold after a participant had an adverse reaction in the UK.
AstraZeneca described it as a "routine" pause in the case of "an unexplained illness".
The outcome of vaccine trials is being closely watched around the world.
The AstraZeneca-Oxford University vaccine is seen as a strong contender among dozens being developed globally.
Hopes have been high that the vaccine might be one of the first to come on the market, following successful phase 1 and 2 testing .
Its move to Phase 3 testing in recent weeks has involved some 30,000 participants in the US as well as in the UK, Brazil and South Africa. Phase 3 trials in vaccines often involve thousands of participants and can last several years.
What have the developers said?
All international trial sites have now been put on pause while an independent investigation reviews the safety data before regulators decide whether the trial can restart, the BBC's Medical Editor Fergus Walsh reports.
"In large trials, illnesses will happen by chance but must be independently reviewed to check this carefully", an Oxford University spokesperson said.
This is the second time the Oxford coronavirus vaccine trial has been put on hold, our correspondent notes. Such events are routine in major trials, and happen any time a volunteer is admitted to hospital when the cause of their illness is not immediately apparent.
It is thought the trials could resume in a matter of days.
Stat News, the health website which first broke the story, said details of the UK participant's adverse reaction were not immediately known , but quoted a source as saying they were expected to recover.
Where are we in the search for a vaccine?
US President Donald Trump has said he wants a vaccine available in the US before 3 November's election, but his comments have raised fears that politics may be prioritised over safety in the rush for a vaccine.
On Tuesday, a group of nine Covid-19 vaccine developers sought to reassure the public by announcing a "historic pledge" to uphold scientific and ethical standards in the search for a vaccine.
AstraZeneca is among the nine firms who signed up to the pledge to only apply for regulatory approval after vaccines have gone through three phases of clinical study.
Industry giants Johnson & Johnson, BioNTech, GlaxoSmithKline, Pfizer, Merk, Moderna, Sanofi and Novavax are the other signatories.
They pledged to "always make the safety and well-being of vaccinated individuals our top priority".
The World Health Organization (WHO) says nearly 180 vaccine candidates are being tested around the world but none has yet completed clinical trials.
The organisation has said it does not expect a vaccine to meet its efficacy and safety guidelines in order to be approved this year because of the time it takes to test them safely.
Similar sentiments have been shared by Thomas Cueni, director-general of the International Federation of Pharmaceutical Manufacturers. The industry body represents the companies that signed the pledge.
Despite this, China and Russia have begun inoculating some key workers with domestically developed vaccines. All of them are still listed by the WHO as being in clinical trials.
Meanwhile, the US national regulator, the Food and Drug Administration (FDA), has suggested that coronavirus vaccines may be approved before completing a third phase of clinical trials.
Last week it also emerged that the US Centers for Disease Control and Prevention had urged states to consider waiving certain requirements in order to be ready to distribute a potential vaccine by 1 November - two days before the 3 November presidential election.
Although President Trump has hinted that a vaccine might be available before the election, his Democratic rival Joe Biden has expressed scepticism that Mr Trump will listen to scientists and implement a transparent process.
Despite Kano being the most peaceful State in Nig for the last 5yrs (Alhamdulillah), H.E @GovUmarGanduje is not relenting in his effort to further secure the state, as his admin has installed CCTV around the metropolis with a control centre at police HQ to be commissioned soon.
Despite Kano being the most peaceful State in Nig for the last 5yrs (Alhamdulillah), H.E @GovUmarGanduje is not relenting in his effort to further secure the state, as his admin has installed CCTV around the metropolis with a control centre at police HQ to be commissioned soon. pic.twitter.com/Fx3YPElqVC
Southern Kaduna: Miyetti Allah Resolves To Make Peace With Neighbours
SEPTEMBER 6, 2020 AT 4:52:01 PM
AHMED ALI, KAFANCHAN
Fulani communities under the auspices of Miyetti Allah Cattle Breeders Association of Nigeria (MACBAN), Kaduna state Chapter has extended its peace initiative to the entire Southern Kaduna communities, urging all the chiefdoms and emirates of the geopolitical zone to move toward peace.
It comes two weeks after warring parties of Fulani, Atyap and Hausa communities in Atyap Chiedom of Zangon Kataf local government area of Kaduna state met in a peace-and-reconciliation meeting organised by the traditional ruler of Atyap Chiefdom, Agwatayap Dominic Gambo Yahaya.
This was contained in a communiqué signed by the Kaduna state Chairman of the Association, Haruna Usman Tugga and other executives at the weekend.
The summit, chaired by Dr. Salim Umar called on all the communities not to harbour criminal elements among them but promptly report any suspicious person or activity to the appropriate authorities and also recommends the establishment of Joint Community based Peace and Security Committee at all level to monitor and maintain peace and order among the neighbouring communities.
The 8-point resolution, which called on the farmers to desist from blocking the local and international cattle route, also called on the pastoralist to stop allowing the underage children from rearing cattle in order to prevent further destructions of farm produce within the area and beyond, and promised to reverse to the olden days relationship with their neighbouring communities in the area.
As the communiqué commended the effort of the security agencies especially ‘Operation Safe Haven’ for maintaining peace in the area, they also appealed to the state and federal government to assist those who have lost their cattle and other valuables.
In his remark, the Senator representing Southern Kaduna Senatorial District, Danjuma Tella Laah, said the Fulani of southern Kaduna as well as other tribes of the area are all indigenous people of southern Kaduna, therefore, warned the people to shun inflammatory comments and avoid calling names to each other.
He urged all the parties concerned to take a recourse to when the Fulani and other tribes coexisted harmoniously, noting that only peace can pave way for any meaningful development.
In her remark, the Executive Vice Chairman of Kaduna State Peace Commission, Dr. Priscilla Akut, said it was the desire of the state government to ensure lasting peace, and encouraged other communities to also emulate MACBAN by holding periodic parleys to review peace.
The meeting had in attendance representatives of various security agencies, MACBAN chairmen of Plateau and Nasarawa states as well as other Ardos and different Fulani organizations.
Health › Coronavirus: Oxford University Vaccine Trial Paused After Participant Falls Ill by naptu2(op): 1:09am On Sep 09, 2020
