Understanding Alzheimer’s Disease

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.

Hubballi, May 17: Karnataka Police have arrested the killer, Vishwa, also known as Girish, in the sensational Anjali Ambigera murder case, police said on Friday.

Preliminary investigations reveal that Vishwa was a habitual thief who exploited innocent young women. The accused is also a drunkard and was caught while attempting to commit theft. He was also part of a gang which stole bikes.

The accused targeted gullible young women, enacting a drama of love and playing the emotional card to forcefully extort gold, silver, and cash from them. When Anjali did not agree to any of his attempts to rob her and outrightly rejected his offer to go with him to Mysuru city, he brutally killed her.

The police had formed two teams to hunt down the killer. One of the teams was searching in the south Karnataka region, and another team, which launched a hunt in Davanagere, nabbed him. The accused was arrested by the police on Thursday.

The police could not catch him sooner as the killer did not carry a mobile phone and did not use his phone for 15 days, before murdering Anjali. The jurisdictional Bendigeri Police were aware of the killer's history, but even after the complaint by the girl’s family, they showed "utter negligence".

The 24-year-old Vishwa entered Anjali Ambigera's (20) residence at 5.30 A.M. on Wednesday and stabbed the young woman multiple times before she could react. Vishwa dragged Anjali Ambigera all over the house, kicking and stabbing her. Later, he pushed her into the kitchen where he stabbed her repeatedly.

Despite efforts by Anjali’s grandmother and two sisters to stop the attacker, he killed her and managed to flee. The incident occurred in the Veerapura Oni area within the jurisdiction of the Bendigeri Police Station.

Vishwa had been blackmailing Anjali and pressurising her to accompany him to Mysuru without informing her parents. The incident which took place close on the heels of MCA student Neha Hiremath’s brutal murder by the jilted lover has raised concern over the safety of women all across the state.

The BJP had demanded the resignation of Home Minister G. Parameshwara while the Congress leaders have also demanded that the Hubballi-Dharwad Police Commissioner Renuka Sukumar should be transferred for failing to sensitise the police force regarding issues of women’s safety.

Washington, May 11: The most powerful solar storm in more than two decades struck Earth on Friday, triggering spectacular celestial light shows from Tasmania to Britain -- and threatening possible disruptions to satellites and power grids as it persists into the weekend.

The first of several coronal mass ejections (CMEs) -- expulsions of plasma and magnetic fields from the Sun -- came just after 1600 GMT, according to the National Oceanic and Atmospheric Administration (NOAA)'s Space Weather Prediction Center.

It was later upgraded to an "extreme" geomagnetic storm -- the first since the "Halloween Storms" of October 2003 caused blackouts in Sweden and damaged power infrastructure in South Africa. More CMEs are expected to pummel the planet in the coming days.

Social media lit up with people posting pictures of auroras from northern Europe and Australasia.

"We've just woken the kids to go watch the Northern Lights in the back garden! Clearly visible with the naked eye," Iain Mansfield in Hertford, England, told AFP.

That sense of wonder was shared in Australia's island state of Tasmania.

"Absolutely biblical skies in Tasmania at 4 am this morning. I'm leaving today and knew I could not pass up this opportunity," photographer Sean O' Riordan posted on social media platform X alongside a photo.

Authorities notified satellite operators, airlines, and the power grid to take precautionary steps for potential disruptions caused by changes to Earth's magnetic field.

Elon Musk, whose Starlink satellite internet operator has some 5,000 satellites in low Earth orbit, described the solar storm as the "biggest in a long time."

"Starlink satellites are under a lot of pressure, but holding up so far," Musk posted on his X platform.

Unlike solar flares, which travel at the speed of light and reach Earth in around eight minutes, CMEs travel at a more sedate pace, with officials putting the current average at 800 kilometers (500 miles) per second.

The CMEs emanated from a massive sunspot cluster that is 17 times wider than our planet. The Sun is approaching the peak of an 11-year cycle that brings heightened activity.

'Go outside tonight and look'

Mathew Owens, a professor of space physics at the University of Reading, told AFP that how far the effects would be felt over the planet's northern and southern latitudes would depend on the storm's final strength.

"Go outside tonight and look would be my advice because if you see the aurora, it's quite a spectacular thing," he said. People with eclipse glasses can also look for the sunspot cluster during the day.

In the United States, this could include places such as Northern California and Alabama, officials said.

NOAA's Brent Gordon encouraged the public to try to capture the night sky with phone cameras even if they couldn't see auroras with their naked eyes.

"Just go out your back door and take a picture with the newer cell phones and you'd be amazed at what you see in that picture versus what you see with your eyes."

Spacecraft and pigeons

Fluctuating magnetic fields associated with geomagnetic storms induce currents in long wires, including power lines, which can potentially lead to blackouts. Long pipelines can also become electrified, leading to engineering problems.

Spacecraft are also at risk from high doses of radiation, although the atmosphere prevents this from reaching Earth.

NASA has a dedicated team looking into astronaut safety and can ask astronauts on the International Space Station to move to places within the outpost that are better shielded.

Following one particularly strong flare peak, the US Space Weather Prediction Center said users of high-frequency radio signals "may experience temporary degradation or complete loss of signal on much of the sunlit side of Earth."

Even pigeons and other species that have internal biological compasses could also be affected. Pigeon handlers have noted a reduction in birds coming home during geomagnetic storms, according to NASA's Jet Propulsion Laboratory.

Officials said people should have the normal backup plans in place for power outages, such as having flashlights, batteries, and radios at hand.

The most powerful geomagnetic storm in recorded history, known as the Carrington Event after British astronomer Richard Carrington, occurred in September 1859.