Mayan ‘doomsday' sweeps across world, no casualties

Houston, Mar 15: Researchers, studying the novel coronavirus, have found that the time between cases in a chain of transmission is less than a week, and over 10 per cent of patients are infected by someone who has the virus, but does not show symptoms yet, a finding that may help public health officials contain the pandemic.

The study, published in the journal Emerging Infectious Diseases, estimated what's called the serial interval of the coronavirus by measuring the time it takes for symptoms to appear in two people with the virus -- the person who infects another, and the infected second person.

According to the researchers, including those from the University of Texas at Austin, the average serial interval for the novel coronavirus in China was approximately four days.

They said the speed of an epidemic depends on two things -- how many people each case infects, and how long it takes cases to spread.

The first quantity, the scientists said, is called the reproduction number, and the second is the serial interval.

Due to the short serial interval of the disease caused by the coronavirus -- COVID-19 -- they said, emerging outbreaks will grow quickly, and could be difficult to stop.

“Ebola, with a serial interval of several weeks, is much easier to contain than influenza, with a serial interval of only a few days,” said Lauren Ancel Meyers, study co-author from UT Austin.

Meyers explained that public health responders to Ebola outbreaks have much more time to identify and isolate cases before they infect others.

“The data suggest that this coronavirus may spread like the flu. That means we need to move quickly and aggressively to curb the emerging threat,” Meyers added.

In the study, the scientists examined more than 450 infection case reports from 93 cities in China, and found the strongest evidence yet that people without symptoms must be transmitting the virus -- known as pre-symptomatic transmission.

More than one in ten infections were from people who had the virus but did not yet feel sick, the scientists said.

While researchers across the globe had some uncertainty until now about asymptomatic transmission with the coronavirus, the new evidence could provide guidance to public health officials on how to contain the spread of the disease.

“This provides evidence that extensive control measures including isolation, quarantine, school closures, travel restrictions and cancellation of mass gatherings may be warranted,” Meyers said.

The researchers cautioned that asymptomatic transmission makes containment more difficult.

With hundreds of new cases emerging around the world every day, the scientists said, the data may offer a different picture over time.

They said infection case reports are based on people's memories of where they went and whom they had contact with, and if health officials move quickly to isolate patients, that may also skew the data.

“Our findings are corroborated by instances of silent transmission and rising case counts in hundreds of cities worldwide. This tells us that COVID-19 outbreaks can be elusive and require extreme measures,” Meyers said.

Paris, Apr 10: French pharma major Sanofi said on Friday it has decided to donate 100 million doses of hydroxychloroquine, the anti-malaria drug which could be a potential weapon against novel coronavirus, across 50 countries.

The company has already doubled its incremental production capacity on top of the usual production for current indications across its eight hydroxychloroquine manufacturing sites worldwide and is on track to quadruple it by the summer.

"In this global health emergency, Sanofi stands ready to assist as many countries as possible, starting with countries where its medicine is registered for current approved indications as well as countries where there are no hydroxychloroquine suppliers or countries with underserved populations," it said in a statement.

Sanofi called for coordination among the entire hydroxychloroquine chain worldwide to ensure the continued supply of the medicine if proven to be a well-tolerated and effective treatment in COVID-19 patients.

"The COVID-19 pandemic is an unprecedented health and economic crisis which is shaking some of the very fundamentals of international solidarity and cooperation among countries," said Chief Executive Officer Paul Hudson. "This virus does not care about the concept of borders, so we should not either," he added.

"It is critical that international authorities, local governments, manufacturers and all other players involved in the hydroxychloroquine chain work together in a coordinated manner to ensure all patients who may benefit from this potential treatment can access it. If the trials prove positive, we hope our donation will play a critical role for patients," said Hudson.

While hydroxychloroquine is generating a lot of hope for patients around the world, said Sanofi, it should be remembered that there are no results from ongoing studies and the results may be positive or negative.

To date, there is insufficient clinical evidence to draw any conclusion over the safety and efficacy of hydroxychloroquine in the management of COVID-19 patients.

It is one of several medicines being investigated by the World Health Organisation (WHO) in its international clinical trial seeking a treatment solution for COVID-19. "Sanofi is supporting ongoing trials by providing the medicine to some participating investigator sites and other independent research centres," it said.

Washington, May 12: The US Federal Bureau of Investigation and cybersecurity experts believe Chinese hackers are trying to steal research on developing a vaccine against coronavirus, two newspapers reported Monday.

The FBI and Department of Homeland Security are planning to release a warning about the Chinese hacking as governments and private firms race to develop a vaccine for COVID-19, the Wall Street Journal and New York Times reported.

The hackers are also targeting information and intellectual property on treatments and testing for COVID-19.

US officials alleged that the hackers are linked to the Chinese government, the reports say.

The official warning could come within days.

In Beijing Foreign Affairs ministry spokesman Zhao Lijian rejected the allegation, saying China firmly opposes all cyber attacks.

"We are leading the world in COVID-19 treatment and vaccine research. It is immoral to target China with rumors and slanders in the absence of any evidence," Zhao said.

Asked about the reports, President Donald Trump did not confirm them, but said: "What else is new with China? What else is new? Tell me. I'm not happy with China."

"We're watching it very closely," he added.

A US warning would add to a series of alerts and reports accusing government-backed hackers in Iran, North Korea, Russia and China of malicious activity related to the pandemic, from pumping out false news to targeting workers and scientists.

The New York Times said it could be a prelude to officially-sanctioned counterattacks by US agencies involved in cyber warfare, including the Pentagon's Cyber Command and the National Security Agency.

Last week in a joint message Britain and the United States warned of a rise in cyber attacks against health professionals involved in the coronavirus response by organised criminals "often linked with other state actors."

Britain's National Cyber Security Centre and the US Cybersecurity and Infrastructure Security Agency said they had detected large-scale "password spraying" tactics -- hackers trying to access accounts through commonly used passwords -- aimed at healthcare bodies and medical research organisations.