What's scariest part of the sly coronavirus? Asymptomatic & presymptomatic carriers
The role of healthy people in swelling the Covid cases remains unanswered.
By AP |
iStock
Travellers with no coughs can slip past airport screens.
WASHINGTON: One of the great mysteries of the coronavirus is how quickly it rocketed around the world. It first flared in central China and, within three months, was on every continent but Antarctica, shutting down daily life for millions.
Behind the rapid spread was something that initially caught scientists off guard, baffled health authorities and undermined early containment efforts - the virus could be spread by seemingly healthy people.
As workers return to offices, children prepare to return to schools and those desperate for normalcy again visit malls and restaurants, the emerging science points to a menacing reality: If people who appear healthy can transmit the illness, it may be impossible to contain.
"It can be a killer and then 40 percent of people don't even know they have it," said Dr. Eric Topol, head of Scripps Research Translational Institute. "We have to get out of the denial mode, because it's real."
Researchers have exposed the frightening likelihood of silent spread of the virus by asymptomatic and presymptomatic carriers. But how major a role seemingly healthy people play in swelling the ranks of those infected remains unanswered - and at the top of the scientific agenda.
The small but mighty coronavirus can unlock a human cell, set up shop and mass produce tens of thousands of copies of itself in a single day. Virus levels skyrocket before the first cough, if one ever arrives. And astonishing to scientists, an estimated 4 in 10 infected people don't ever have symptoms.
The dire toll of more than 580,000 worldwide deaths from the coronavirus has faded to the background as cities lift restrictions. But the slyness of the virus remains on the minds of many scientists, who are watching societies reopen, wondering what happens if silent spreaders aren't detected until it's too late.
Travelers with no coughs can slip past airport screens. Workers without fevers won't be caught by temperature checks. People who don't feel tired and achy will attend business meetings.
The World Health Organization (WHO) for the longest time believed that coronavirus cannot infect pets like dogs or cats.
In less than a month, several reports of various animals contracting the diseases made the WHO pause and think about their stance. The reports suggest that this deadly virus can break the species barrier and move around.
WHO's intergovernmental animal health body - World Organisation for Animal Health (OIE) - confirmed that there is a possibility that some animals can get infected through close contact with infected humans.
OIE said that studies are under way to understand the issue better and that it is still too early to say whether pets could be the intermediate host in the transmission of the COVID-19.
While they are urging anyone who has become sick to limit contact with pets, we look at all the animals who contracted the disease from humans.
(Representative Image)
The World Health Organization (WHO) for the longest time believed that coronavirus cannot infect pets like dogs or cats.In less than a month, several reports of various animals contracting the diseas..
Read More
Warning! This might upset all dog lovers out there.
The first animal in the world to test positive for coronavirus was a 17-year-old dog which had to be kept under mandatory quarantine in Hong Kong since February 26. The news got grim when the owner revealed that the canine passed away on March 16 - less than a week after he was declared Covid-19-free and released from the government facility.
He was sent home after testing negative, but it was not clear if the virus was the reason for the animal's death. The 60-year-old owner, who also recovered from her Covid journey after being in quarantine, had refused an autopsy of his pet to determine cause of death.
The Pomeranian had been through five tests and all returned 'weak positive' for the new virus.
The last two tests - carried out on March 12 and 13 - 'proved the dog's samples were negative'.
(Representative Image)
Warning! This might upset all dog lovers out there.The first animal in the world to test positive for coronavirus was a 17-year-old dog which had to be kept under mandatory quarantine in Hong Kong si..
Read More
Days after the death of the world's first animal detected with Covid-19, another case emerged in Hong Kong, again, where a German Shepherd living in the Pok Fu Lam area had tested positive for coronavirus during a screening campaign.
While the dog was asymptomatic, his mixed-breed sibling who was living in the same house had tested negative. Both canines were put under quarantine along with their owner who had tested positive as well.
(Representative Image)
Days after the death of the world's first animal detected with Covid-19, another case emerged in Hong Kong, again, where a German Shepherd living in the Pok Fu Lam area had tested positive for corona..
Read More
During a screening campaign carried out on 17 dogs and eight cats living in contact with people carrying the virus, where two canines tested positive, other pets animals like a cat and three dogs were also placed at the animal keeping facility in Hong Kong.
Apart from the Pomeranian which died, the other three animals - an exotic shorthair cat, a Shiba Inu and a mongrel - were also tested negative for the deadly virus, according to reports.
(Representative Image)
During a screening campaign carried out on 17 dogs and eight cats living in contact with people carrying the virus, where two canines tested positive, other pets animals like a cat and three dogs wer..
Read More
Coronavirus didn't spare the felines. In late March, a pet cat was found infected with Covid-19 in Belgium, and it was believed that it contracted the virus from the people it was living with. The corona cat suffered from transitory respiratory and digestive problems after contracting the infection.
To shock you further, the Chinese researchers from Harbin Veterinary Research Institute revealed in a study that cats are not only susceptible to contracting the deadly virus, but could also pass it on to other cats.
However, the study said that other animals such as dogs (despite two known positive cases worldwide), chicken and pigs weren't susceptible like ferrets and cats.
Back home, in an interesting development, authorities have even warmed up to feline lovers. In Kerala, the High Court on April 6 allowed a permit to a cat owner to drive around town in his car amid lockdown to buy food (seven kg biscuits) for his pets.
(Representative Image)
Coronavirus didn't spare the felines. In late March, a pet cat was found infected with Covid-19 in Belgium, and it was believed that it contracted the virus from the people it was living with. The co..
Read More
Another resident of the cat family, a 4-year-old female Malayan tiger, Nadia, tested positive for the novel coronavirus on April 6. The tigress, who lives at the Bronx Zoo in New York with six other big cats, is said to have contracted the deadly virus by an asymptomatic zoo keeper.
Nadia's sister, Azul, and two Amur tigers had also developed a dry cough and loss of appetite.
This case came as a shocker as this was believed to be the first known case of an animal infected with COVID-19 in the US, raising questions about human-to-animal transmission of the virus.
Another resident of the cat family, a 4-year-old female Malayan tiger, Nadia, tested positive for the novel coronavirus on April 6. The tigress, who lives at the Bronx Zoo in New York with six other ..
Read More
Along with the 4-year-old Nadia, three African lions had also developed a dry cough and decrease in appetite. While they did not contract the virus, it was reported that they were expected to recover soon.
The deep-chested cats were put under veterinary care, and were seen bright, alert and interactive with the zookeepers at the Bronx Zoo in New York.
(Representative Image)
Along with the 4-year-old Nadia, three African lions had also developed a dry cough and decrease in appetite. While they did not contract the virus, it was reported that they were expected to recover..
