SHANGHAI: Scientists in China studying the coronavirus outbreak said they had found two main types of the disease could be causing infections.
The researchers, from Peking University’s School of Life Sciences and the Institut Pasteur of Shanghai under the Chinese Academy of Sciences, cautioned that their analysis examined a limited range of data, and said follow-up studies of larger data sets are needed to better understand the virus’s evolution.
The preliminary study found that a more aggressive type of the new coronavirus associated with the disease outbreak in Wuhan accounted for about 70% of analyzed strains, while 30% was linked to a less aggressive type.
The prevalence of the more aggressive virus decreased after early January 2020, they said.
“These findings strongly support an urgent need for further immediate, comprehensive studies that combine genomic data, epidemiological data, and chart records of the clinical symptoms of patients with coronavirus disease 2019 (COVID-19),” they wrote.
Their findings were published on Tuesday in the National Science Review, the journal of the Chinese Academy of Sciences.
Also on Wednesday, one of China’s top medical associations confirmed that the median incubation period of the coronavirus is five to seven days and the maximum 14 days.
The remarks by Du Bin, chairman of the critical care medical branch of the Chinese Medical Association, mark the most conclusive assessment of the virus’ incubation period by a government-affiliated medical organization to date.
The revelations came amid a fall in new coronavirus cases following crippling restrictions imposed on the world’s second largest economy to stop its spread, including transport suspensions and the extension of the Lunar New Year holiday.
New cases down
Mainland China had 119 new confirmed cases of coronavirus on Tuesday, the National Health Commission said, down from 125 the previous day, in a broad trend that has seen numbers of new cases fall from the middle of February.
The total number of cases on the mainland has now reached 80,270. The number of deaths rose by 38 to bring the total toll for mainland China to 2,981 by March 3.
All but one new death occurred in Hubei province, where the outbreak started.
With the number of new daily infections overseas now exceeding new cases in China, Chinese officials have begun to seek ways to control the spread of the virus outside of China and guard against future outbreaks.
Authorities have asked overseas Chinese hoping to return home to reconsider their travel plans, while cities across the country have set up quarantine rules for those entering from high-risk places.
An infected person is known to have arrived in China from Iran, one of the virus’ new hotspots, last week.
China is encouraging domestic producers of medical protective equipment to export protective suits to meet overseas demand as the virus spreads, Cao Xuejun, an official with China’s Ministry of Industry and Information Technology said in a press briefing in Beijing on Wednesday.
China’s health authorities are also studying setting up emergency reserves for medical resources and protective materials, Mao Qunan, an official at China’s National Health Commission said at the same briefing.
Researchers identify two coronavirus types as China cases dwindle
Researchers identify two coronavirus types as China cases dwindle
- The study found that one of the strains is more aggressive
- Around 70% of the analysed strains belong to the more aggressive type
Florida braces for frost and possible snow flurries as winter storms hit other parts of the US
- The worst seems to be heading toward the Carolinas, but the Sunshine State’s humans, animals and even plants are preparing for winter weather
MIAMI: Florida won’t be getting hit with massive blankets of snow and ice like the rest of the US, but even frosty windshields and a few flurries can feel like Antarctica to people with permanent sandal tans.
The Midwest and South have been getting major winter storms for several days, and a giant cyclone forecast in the Atlantic Ocean is expected to pull that cold weather east as a powerful blizzard this weekend. The worst seems to be heading toward the Carolinas, but the Sunshine State’s humans, animals and even plants are preparing for winter weather.
Florida could experience record cold
Ana Torres-Vazquez, a forecaster with the National Weather Service in Miami, said a cold front earlier this week has already caused temperatures to dip some, but the region could experience record-setting cold this weekend.
“It looks like temperatures across South Florida are dipping into the 30s (Fahrenheit) for most of the metro area and maybe into the 20s for areas near Lake Okeechobee,” Torres-Vazquez said. “And then the windchill could make those temperatures feel even cooler.”
Residents of South Florida are less likely to have heavy coats and other winter clothes, so Torres-Vazquez said it’s important to layer up lighter clothing and limit time spent outside.
Moving north, Tony Hurt, a National Weather Service forecaster for the Tampa Bay area, said there’s a 10 to 20 percent chance of snowfall in that region this weekend.
“Most likely if there’s any snow that does actually materialize, it’ll be primarily in the form of flurries, no accumulations,” Hurt said.
The last two times the area got snow was flurries in January 2010 and December 1989. The record for snowfall was in January 1977, with 2 inches (5 centimeters) of snow about 20 miles (32 kilometers) east of Tampa.
Despite the possibility of snow, Tampa will host the annual Gasparilla Pirate Fest on Saturday. And on Sunday, the Tampa Bay Lightning are set to host the Boston Bruins for an outdoor NHL game at the Tampa Bay Buccaneers’ home NFL stadium.
Few tourists visiting Florida will be swimming in the ocean or laying out on sunny beaches this weekend, but many attractions will remain open. Most of Walt Disney World and Universal Orlando will operate normally, though their water parks will be closed. Most of the state’s zoos and animal parks will also remain open while keepers take steps to protect the inhabitants.
Zoo keepers working to keep animals safe and warm
Zoo Miami spokesman Ron Magill said keepers have been setting up heaters and moving reptiles and smaller mammals to indoor enclosures, while primates like chimpanzees and orangutans are given blankets to keep themselves warm. Big cats and large hoofed animals generally do well in colder temperatures and don’t require much assistance from keepers.
“It can be invigorating for animals like the tiger, so they’ll actually become more active,” Magill said.
Outside the safety of the zoo, Florida’s native wildlife has evolved and learned to survive occasional cold snaps, though casualties will still occur, Magill said. Manatees, for example, have spent decades congregating at the warm-water outflows of about a dozen power plants around Florida.
But invasive, nonnative animals like iguanas and other exotic reptiles will suffer the most, Magill said. Iguanas in South Florida famously enter a torpid state during cold periods and even fall out of trees. They usually wake up when the temperature increases, but many will die after more than a day of extreme cold.
“At the end of the day, they don’t belong here, and that might be nature’s way of trying to clean that up a little bit,” Magill said. “That is a part of natural selection.”
Protecting crops is a priority for farmers
Florida’s agriculture industry is also bracing for the cold. Farmers are working to safeguard their crops as winter harvest continues and spring planting begins in some areas, Florida Fruit & Vegetable Association spokeswoman Christina Morton said.
“Preparations vary by crop and include harvesting and planting ahead of the freeze, increasing water levels in ditches, using overhead irrigation, and, in some cases, deploying helicopters to protect sensitive fields,” Morton said.
The Florida deep freeze comes as the arctic blast from Canada also spreads into southern states where thousands of people remain without power to heat their homes, and people in mid-Atlantic states prepare for possible blizzard conditions as a new storm is expected to churn along the East Coast.
Temperatures in hard-hit northern Mississippi will feel as cold as minus 5 degrees Fahrenheit (minus 21 degrees Celsius) when the expected strong winds are factored in, National Weather Service forecasters say. People in a large part of the southeastern US were under a variety of alerts warning of extremely cold weather on the way.
The storm expected to hit the Eastern Seaboard has prompted more warnings in the Carolinas and nearby states. That storm is expected to bring heavy snow and strong winds, which could create “dangerous, near-blizzard conditions,” the weather service warned.










