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AstraZeneca said on Tuesday it had initiated the worldwide withdrawal of its COVID-19 vaccine due to a "surplus of available updated vaccines" since the pandemic.

The company also said it would proceed to withdraw the vaccine Vaxzevria's marketing authorizations within Europe.

"As multiple, variant Covid-19 vaccines have since been developed there is a surplus of available updated vaccines," the company said, adding that this had led to a decline in demand for Vaxzevria, which is no longer being manufactured or supplied.

According to media reports, the Anglo-Swedish drugmaker has previously admitted in court documents that the vaccine causes side-effects such as blood clots and low blood platelet counts.

The firm's application to withdraw the vaccine was made on March 5 and came into effect on May 7, according to the Telegraph, which first reported the development.

London-listed AstraZeneca began moving into respiratory syncytial virus vaccines and obesity drugs through several deals last year after a slowdown in growth as COVID-19 medicine sales declined.

Pro-Gaza US protesters in New York's Columbia University say they will stay put despite the university's harassment and police crackdown.

The protesters said they refuse to concede to "cowardly threats and blatant intimidation" by university administration, asserting that they will continue to peacefully protest.

Columbia University threatened the students with the national guard after refusing to bargain in good faith.

The university announced a midnight deadline for talks regarding the removal of pro-Palestine encampments on the varsity campus, warning that their campsite will be forcefully cleared by police if no agreement is reached.

The university campus is being used as a campsite for hundreds of pro-Palestine protesters and other activists, who have gathered and set up numerous tents.

Pro-Palestinian protests at colleges have demanded that their universities divest from corporations doing business with Israel or profiting off the war in Gaza. At Columbia, protesters have also asked the university to end a dual-degree program with Tel Aviv University.

The deadline was announced by Columbia University President Minouche Shafik late Tuesday, as authorities across major American universities have launched their repression campaigns against the pro-Palestinian protests on campuses, amid rising anger over US's support for Israel. 

Shafik has issued a midnight deadline to protesters and organizers, warning that failure to comply will result in the forcible clearance of the camp by the New York Police Department (NYPD).

The university has engaged in discussions with student leaders behind the protests, which are part of a series of protests taking place at various colleges nationwide and resulting in multiple arrests.

The purpose of these talks is to address the encampment on the west lawn of Columbia's Morningside Heights campus.

American universities are grappling with the challenge of maintaining a delicate balance between the right to protest and freedom of speech, while also ensuring campus rules and safety, as tensions surrounding the ongoing war in Gaza continue to permeate across campuses.

Meanwhile, Shafik underscored the importance of free speech and the right to demonstrate, but highlighted significant safety issues, disruptions to campus activities, and a strained environment due to the encampment. She firmly stated that any form of intimidation, harassment, or discrimination would not be accepted.

The arrest of more than 100 protesters at Columbia University last week led to more campus demonstrations, at New York University, Yale, and the University of California, Berkeley.

Palestinian university professor Sami al-Arian said what is happening across US university campuses is unprecedented.

Al-Arian said, "I lived four decades in the US, 28 years of which were in academic settings. During my time, it was a very challenging struggle to present an anti-Zionist narrative."

"But the passion, courage, humanity, creativity, and determination displayed these days by students across US campuses make me proud. The Zionist grip on US society is weakening and waning."

"I always wanted to be in a bar fight," said a US police official after pinning a Black man down on the ground and kneeling on his neck. The man later died at a hospital.

Ohio Police have come under intense scrutiny following the release of body camera footage showing officers pinning a Black man to the ground in a bar, reminiscent of the events that led to George Floyd's death in 2020.

The video, released by the Canton Police Department, captured the moments leading up to the death of Frank Tyson, a 53-year-old man suspected of leaving the scene of a single-car accident on April 18.

In the footage, officers are seen confronting Tyson inside a bar, where an altercation quickly ensues. Despite Tyson's pleas for help and his repeated cries of "I can't breathe," officers wrestle him to the ground and handcuff him, with one officer applying pressure to his back near his neck while saying, "You're fine." 

Tyson continues to plead for relief while lying on the floor. After several minutes, officers notice his lack of responsiveness and proceed to administer CPR. Paramedics arrive on the scene and transport Tyson to a local hospital, where he later dies.

In the body cam footage, one police officer can be heard bragging about how he always wanted to be in a "bar fight" with one of the patrons of the establishment. 

The circumstances surrounding Tyson's death draw chilling parallels to George Floyd's fatal encounter with Minneapolis Police in 2020 which sparked global outrage. 

The officers involved in Tyson's case, identified as Beau Schoenegge and Camden Burch, have been placed on administrative leave pending an investigation by the Ohio Bureau of Criminal Investigation.