Data of 267 million Facebook users leaked online

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.

Hubei, Feb 10: The death toll in the deadly coronavirus outbreak in China and other parts of the world has reached 904, CNN reported citing Chinese authorities on Monday.

The number of infected people globally has now hit the 40,000 mark.

According to the country's health officials, the number of people, who died from coronavirus in the Hubei Province, has risen to 871.

"As of 24:00 on February 9, Hubei Province reported a total of 29,631 cases of new coronavirus pneumonia, including 16,902 cases in Wuhan. 22,160 patients are still being treated in hospitals. 73,127 people remain under medical observation," read the statement from the Chinese Regional Health Committee.

The novel coronavirus was first detected in China's Wuhan city in late December and has since spread to more than 25 countries.

On Sunday, the new coronavirus even surpassed the fatalities caused by the SARS epidemic in 2003.

The World Health Organisation (WHO) has declared a global health emergency in the wake of the outbreak.

Meanwhile, WHO's international expert mission led by Dr Bruce Aylward embarked for China.

Islamabad, May 24: Pakistan recorded 32 coronavirus-related deaths during the last 24 hours, taking the total number of fatalities in the country to 1,133, the health ministry said on Sunday.

The total number of COVID-19 patients in Pakistan also jumped to 54,601, it said.

Read: Coronavirus India update: State-wise total number of confirmed cases, deaths

Sindh reported the maximum number of 21,645 coronavirus cases, followed by Punjab at 19,557, Khyber-Pakhtukhwa at 7,685, Balochistan at 3,306, Islamabad at 1,592, Gilgit-Baltistan at 619 and Pakistan-occupied Kashmir (PoK) at 197.

According to the health ministry, 17,198 coronavirus patients have recovered and 473,607 tests, including 12,915 in the last 24 hours, have been conducted so far.

The government also issued strict instructions to observe social distancing while offering Eid prayer and asked people to avoid visiting relatives and hosting parties.

Eid congregations were held at open places, mosques and Eidgahs in all major cities and towns while following strict standard operating procedures (SOPs) of social distancing and other precautionary measures.

Pakistan Prime Minister's Special Assistant on Health Zafar Mirza on Friday said the deadly infection would continue to multiply if precautions are not taken.

Earlier this month, the government had announced the lifting of the countrywide lockdown imposed to curb the spread of the virus in phases, even as infections continued to rise in the country.

Prime Minister Imran Khan had cited the economic havoc the virus restrictions had wreaked on citizens as the reason behind the decision.

The prime minister on Saturday urged Pakistanis to forgo traditional Eid festivity in view of the hundreds of fatalities caused by the coronavirus and the lives lost in Friday's plane crash in Karachi.

Ninety-seven people, including nine children, were killed and two passengers miraculously survived a fiery crash when a Pakistan International Airlines plane with 99 travellers on board plunged into a densely populated residential area near the Jinnah International Airport in Karachi. Most of the victims were travelling home to celebrate Eid.