Khan vilatey
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Even a socialists like Najam Sethi agrees that the army should take over the corna virus response
KV
KV
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can you tell me summary in more easy languageHave read that there are two strains of this virus.. If one strain is killed by the immune system, a second strain can again attack.
Don't know if both strains are infecting people in Pakistan.
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Two strains of the new coronavirus are spreading around the world, according to an analysis of 103 cases. But the World Health Organization insists that “there is no evidence that the virus has been changing”. So how many strains are there, and why does it matter?
Viruses are always mutating, especially RNA viruses like this one, coronavirus SARS-CoV-2. When a person is infected with the coronavirus, it replicates in their respiratory tract. Every time it does, around half a dozen genetic mutations occur, says Ian Jones at the University of Reading, UK.
When Xiaolu Tang at Peking University in Beijing and colleagues studied the viral genome taken from 103 cases, they found common mutations at two locations on the genome. The team identified two types of the virus based on differences in the genome at these two regions: 72 were considered to be the “L-type” and 29 were classed “S-type”.
A separate analysis by the team suggests that the L-type was derived from the older S-type. The first strain is likely to have emerged around the time the virus jumped from animals to humans. The second emerged soon after that, says the team. Both are involved in the current global outbreak. The fact that the L-type is more prevalent suggests that it is “more aggressive” than the S-type, the team say.
“There do appear to be two different strains,” says Ravinder Kanda at Oxford Brookes University in the UK. “[The L-type] might be more aggressive in transmitting itself, but we have no idea yet how these underlying genetic changes will relate to disease severity,” she says.
“I think it’s a fact that there are two strains,” says Erik Volz at Imperial College London. “It’s normal for viruses to undergo evolution when they are transmitted to a new host.”
It is vital to know how many strains of the virus exist. Around the world, multiple groups are working on a vaccine for the virus. Any vaccine will need to target features that are found in both strains of the virus in order to be effective.
The differences between the two identified strains are tiny. In fact, they can’t really be considered to be separate “strains”, says Jones. And many of the genetic differences won’t affect the production of proteins, and so won’t change the way the virus works, or the symptoms it causes, he says. One is not more deadly than the other.
“In all practical terms, the virus is as it was when it originally emerged,” says Jones. “There’s no evidence it is getting any worse.” The sentiment is echoed by the World Health Organization. The study by Tang and colleagues only suggests there is some genetic diversity of the virus – it doesn’t mean it is changing, a representative told New Scientist.
But we can’t say for sure. The study only represents 103 cases. A larger, online database has collated the sequencing results from 166 cases. Both represent a drop in the ocean of the almost 100,000 officially reported cases.
Jones says we can expect more strains to emerge. Epidemiologists generally agree that, once a person is infected with the coronavirus, they are unlikely to be infected again – unless the virus mutates to allow it to overcome the immune system’s defences.
This “selection pressure” could lead to the outbreak of a new strain, says Jones. This is the case with seasonal flu – new variants crop up every year that can infect people whether or not they’ve had flu in the past.
We could see the same pattern emerge for the new coronavirus in the coming years, says Jones. “I don’t see it going away any time soon.”
https://www.newscientist.com/articl...strains-and-is-one-more-deadly/#ixzz6Gx21V3op
As per the information available after investigating the virus in 103 infected people, there are two strains, which means a person may be affected twice. But it also says that one strain is more common, which means the second one might not get out of China.. and in that case, if Pakistanis are only contracting one type of virus, and second one isn't present in Pakistan, Pakistanis have a chance of contracting the disease only once.can you tell me summary in more easy language
thanks, now that is a bit easy to understand, but my worries is still that what if it attacks again.....n again n againAs per the information available after investigating the virus in 103 infected people, there are two strains, which means a person may be affected twice. But it also says that one strain is more common, which means the second one might not get out of China.. and in that case, if Pakistanis are only contracting one type of virus, and second one isn't present in Pakistan, Pakistanis have a chance of contracting the disease only once.
BUT...
The sample is very small so obviously it's too early to establish that the virus has only two strains.
Also, if this virus (like common cold and flu virus) is able to mutate to form new strains (which is not established yet based on the information available of 103 patients' virus strains), people will start getting infected every time a new strain is formed... that will be scary.. we catch cold and flu every year.. so imagine, this virus will attack by changing its strain every few months..
But if it is limited to only two strains and a human body identifies them as attackers (which happens when immune system response is activated during infection), same strains can't affect again.. as whenever they attack again, our immune system identifies the culprits and kill them before they hijack our bodies like they do the first time.. When a virus attacks for the first time, it takes our immune system sometime to realize.. ohh that's a BC culprit hijacking the body.. lets start killing it.. our immune system starts a series of attacks, including rising temperature, forming mucous, our bodies bones start aching and we start feeling lethargic (because more white blood cells are produced and bones and muscles get the nutrients as low priority) etc.. the illness is due to the activation of immune response.. which means that internal system has started acting against the virus. The incubation period is when our bodies don't even know there's an intruder which has hijacked our bodies to create its copies.
A quick immune system response (after 2-5 days) means that we will be less sick.. but if the incubation period is long and our immune system is weak and couldn't recognize them for a couple of weeks, the illness will be much worst.. because imagine how many millions of copies they have produced before our immune system recognized them as intruders..
So to fortify our immune system, we must take at least 7 hours of sleep and eat good stuff.. that will enable our immune system to wake up and fight the virus off within a week..
Yesterday Usman Buzdar in a tweet confirmed 26 Cases in Punjab how did that came to 9 overnightThe death is not officially confirmed. According Zafar Mirza (2H ago):
ICT: 7
Punjab: 9
Sindh: 183
KPK: 19
Bln: 15
AJK: 1
GB: 13
There is no COVID19 related reported deaths so far in Pak. Allhamdolillah. <260>
Many different reports and misinformation out their. Zafar Mirza is the official authority on this for the GOP.Yesterday Usman Buzdar in a tweet confirmed 26 Cases in Punjab how did that came to 9 overnight