May 27 coronavirus news

Research published this week indicates that Covid-19 antibodies produced by those with mild infection may remain detectable for at least 11 months post-infection. 

In the study published in the journal Nature, researchers took blood samples from 77 people previously infected with Covid-19. In the initial phase of the study, samples showed a decrease in the presence of Covid-19 antibodies post-infection. Between four and 11 months post-infection, this decline slowed. 

However, researchers also took bone marrow samples from 18 previously infected patients, to measure the presence of bone marrow plasma cells, which are important in antibody protection and the development of long-term viral protection.  

Within the bone marrow samples, researchers did find long-lived bone marrow plasma cells (BMPC) which would produce Covid-19 antibodies. Unlike the decline in other antibodies observed, BMPC levels remained stable 7 to 11 months after infection.

“We’re looking at the source of these antibodies that are produced by cells that live in our bone marrow,” Ali Ellebedy, an associate professor at the Washington University in St. Louis School of Medicine who contributed to the study told CNN on Wednesday.  

Researchers said the presence of these cells does not automatically mean a robust immune response would kick in if any of these participants were to be re-infected, but that the potential for long-lived immune response is present. 

“I think it’s very important to make a distinction between having an antibody doesn’t mean you’re completely protected, that’s very different,” he said. “But what we should be excited about and encouraged about is you have these memory cells that are ready to jump into action once we have the virus or once we get exposed to the virus again.”

The companies Sanofi and GlaxoSmithKline announced on Thursday that they have started enrolling volunteers in their Phase 3 clinical trial to assess the safety and efficacy of their coronavirus vaccine.

The trial will include more than 35,000 participants aged 18 and older from around the world, including the United States, Asia, Africa and Latin America, according to statements from the companies.

"We are encouraged to see first vaccinations starting to take place in such an important, pivotal Phase 3 study, as we believe that our unique technology platform will provide a clinically-relevant vaccine option," Thomas Triomphe, executive vice president and global Head of Sanofi Pasteur, said in the statement.

The companies announced that they plan to evaluate the efficacy of their vaccine against variants and test boosters. The release noted that, pending positive Phase 3 trial results, the vaccine could be authorized as early as in the fourth quarter of this year if all goes well.

"We believe further solutions for COVID-19 are very much needed to help reach people around the world, especially as the pandemic evolves and variants continue to emerge," Roger Connor, President of GSK Vaccines, said in the statement.

CEO of Delta Airlines Ed Bastian said the company will only be hiring people who are vaccinated as travel, particularly on planes, starts to reopen.

He said as they are evaluating applicants, Delta can ask them if they have been vaccinated.

Bastian said Delta is encouraging all current employees to get the shot, and right now, about 64% worldwide are vaccinated.

Delta Airlines will be operating at close to 90% of its capacity in the US by this summer, according to Bastian. He said this is ahead of an anticipated surge in demand as restrictions relax.

Bastian said ticket prices are at about 15-20% what they were in 2019.

"As the summer plans continue to get booked, I encourage everyone to go out and hold your seats and get your plans booked because pricing will eventually start to respond to the big surge in demand," he said.

He said Delta will continue to require passengers to wear masks on planes for now, adding the airline will re-evaluate after the federal mandate ends in September.

"I think the majority of our customers appreciate the fact that we... particularly as the planes are full, we're flying at 80% to 90% load factors for this weekend, so I think people actually are happy to be wearing masks, collectively," Bastian said.

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Claims for first-time unemployment benefits fell for the fourth consecutive week last week, hitting a new pandemic low.

Another 406,000 American workers filled jobless claims in the week ending May 22,adjusted for seasonal swings. It was a new low for first-time claims since the pandemic began last March, and fewer than analysts expected. 

As the economy reopens and restrictions ease for vaccinated Americans, the labor market is making strides toward recovering jobs lost during the pandemic.

Claims for pandemic unemployment assistance, which provides benefits for people like the self-employed who aren't eligible for regular state benefits, fell to 93,546 without seasonal adjustments.

Meanwhile, the count for continued jobless claims – the number of people filing for at least two weeks in a row – also fell. In the week ending May 15, continued claims stood at about 3.6 million.

An administration official tells CNN the 90-day window President Biden has given the US intelligence community to investigate the origins of Covid-19 started Wednesday, meaning officials should wrap up their deep dive by Aug. 24. 

The White House has not yet committed to making the results of that report public. Officials had privately debated not even announcing the investigation, multiple people told CNN, but decided to do so in the end amid heightened interest. 

President Biden made the ultimate decision to make the investigation public. 

More on the investigation: Biden said in a statement Wednesday that in March he directed his national security adviser, Jake Sullivan, to task the intelligence community with preparing a report on the most up-to-date analysis of the origins of the Covid-19 pandemic, including whether the virus emerged from human contact with an infected animal or from a laboratory accident. Biden said he received that report earlier this month and asked for additional follow-up.

A series of factors went into Biden's decision to task his intelligence community with a deeper dive into the origins of Covid-19, including the thinking that the initial March-ordered report didn't go far enough in delving into the issue, according to a source familiar with the decision.

Biden viewed Wednesday's statement, and additional review, as in the compelling public interest given the scale of the devastation wrought by the pandemic, the source said.

CNN's Kate Sullivan, Donald Judd and Phil Mattingly contributed reporting to this post.

Japan's government will decide Friday whether to extend a state of emergency across much of the country, nearly two months before the planned start of the delayed Tokyo Summer Olympics.

The country reintroduced emergency measures in April as it grappled with a fourth wave of coronavirus cases -- one that has yet to diminish.

Japan's seven-day average for new cases currently stands at around 4,500, according to a tally by Johns Hopkins University. Meanwhile, only around 2% of the country's 126 million population has been fully vaccinated against Covid-19, according to figures compiled by CNN.

On Monday, the United States advised citizens against traveling to Japan, due to the ongoing outbreak.

The governors of Tokyo and Osaka have already asked the central government to extend the current state of emergency, due to expire on May 31. According to Japanese media, the measures could be extended to June 20. The opening day for the Tokyo 2020 Games -- postponed last year due to the pandemic -- is July 23.

Under the current measures, residents are asked to avoid nonessential outings, work from home and stick to mask-wearing, though such guidance is not mandatory. Large commercial spaces like shopping malls are barred from operating, except to provide essential items and services. Establishments that serve alcohol are advised to shut completely and dry establishments asked to close from 8 p.m., or face a fine.

Prime Minister Yoshihide Suga will meet with experts Friday to discuss the extension over Tokyo, Osaka, Hyogo, Kyoto, and five other prefectures. The southern island prefecture of Okinawa will already be under a state of emergency until June 20.

Both local and international Olympic officials have repeatedly insisted the Games will go ahead despite the situation on the ground with the pandemic, pointing to protections put in place at venues and the Olympic Village to protect athletes and staff.

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With Olympics nearing, Japan considers extending state of emergency

Taiwan plans to spend $7.55 billion on relief measures as it fights its worst Covid outbreak so far, the self-ruled island's National Development Council said Thursday.

The funds will go to subsidies for workers like taxi drivers and tour guides, as well as partial salary compensation for companies affected by ongoing restrictions.

The proposal, which will be discussed in the legislature by the end of the month, is the fourth round of Covid relief that Taiwan has announced since last year, with the first three rounds collectively worth $15 billion.

Contact tracing troubles: On Tuesday, the island's health minister said more than 300 people who tested positive for Covid have been unreachable.

Authorities have been unable to immediately contact 146 people in the capital, Taipei, and 164 in the surrounding New Taipei City, minister Chen Shih-chung told a news conference, voicing concerns this could increase the risk of transmission.

Some background: In 2020, Taiwan had one of the most successful Covid-19 responses in the world, and went more than 250 days without reporting any local infections. The democratic island has been praised internationally for its quick initial action and effective containment measures.

But cases began rising in early May, spiraling into Taiwan's worst outbreak and prompting stringent new restrictions.

On Thursday, Taiwan reported 405 new cases, according to the Central Epidemic Command Center. It also reported 13 new Covid-related deaths -- the highest single-day figure of the pandemic.

The Australian state of Victoria will enter a seven-day circuit-breaker lockdown, as health authorities race to contain a fresh cluster of infections in greater Melbourne. 

The lockdown will start at 11:59 p.m. local time Thursday, running until June 3. People will only be allowed to leave their homes for five reasons: shopping for necessary goods and services, authorized work or permitted education, exercise, caregiving or compassionate and medical reasons, and to get vaccinated. 

Merlino said they have identified more than 10,000 primary and secondary contacts who will need to either quarantine, or test and isolate, adding “that number will continue to grow and change." 

A cluster of infections in greater Melbourne early this week rose to 26 total cases on Thursday, after the state reported 12 new infections overnight. 

On the same day that United States President Joe Biden announced he had directed the national intelligence community to redouble its efforts into the origin of Covid-19, Facebook said it would no longer remove from its platforms claims that the virus was man-made. 

The company had announced in February it would remove any such claims after “consultations with leading health organizations, including the World Health Organization (WHO).”

Politico was first to report the policy change.