The new crown pneumonia epidemic has been repeated, and the Delta variant virus has made everyone panic.
British experts warned on July 30 that if the new coronavirus (SARS-CoV-2) continues to mutate, the death rate may rise to 35 percent.
Experts point out that the mutant virus is more toxic and more spreading, and the symptoms will change after being infected with the mutant virus. It will not cough, and it will not be like a normal infection, which will cause loss of smell. It is easy to think that it is just a bad cold and delay. Seek medical attention, which makes the condition worse.
The new crown pneumonia (COVID-19) has not been curbed, and the Delta variant virus strain first discovered in India has caused outbreaks in many places.
According to the World Health Organization, Delta, the new coronavirus variant virus, is currently the most infectious variant virus known and has spread to at least 85 countries.
U.S. media quoted an internal document from the Centers for Disease Control and Prevention (CDC) on July 29 to report that Delta, a variant strain of the new coronavirus, is as infectious as chickenpox!
Yuan Guoyong said on July 31 that the global epidemic is currently affected by the Delta variant virus. Even if the vaccination rate has reached 70% in some countries, the epidemic has rebounded. The Hong Kong government should learn from the experience of other countries and prepare as soon as possible.
He pointed out that the reason why the Delta variant virus is dangerous is not only because of its high transmission power, but also because it can infect human upper respiratory tract mucosa, that is, the nasopharynx and throat, which makes the patient's viral load higher than the original virus, Alpha Variant viruses and Beta variant viruses are not immune to infection even if they have been vaccinated.
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Symptoms and changes of Delta variant virus
Dr. Lin Wenjian, Director of the Center for Health Protection of the Department of Health, pointed out that studies have shown that Delta virus is also highly infectious and viral.
To avoid infection, you must first understand the characteristics of the virus and the symptoms of infection!
▼What are the changes in the symptoms of Delta virus?
What is the difference between infectivity and incubation period?
(According to the picture 👇👇👇)
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7 things to know about variant viruses
1. How high is the mortality rate of being infected with the new coronavirus?
The British Emergency Scientific Advisory Group (SAGE) published a paper on July 30, stating that if the new coronavirus (SARS-CoV-2) continues to mutate, the mortality rate may rise to 35%, which is similar to Middle East Respiratory Syndrome (MERS). The fatality rate of SARS is 10%.
Experts say this may happen because of the "recombination" of two mutant virus strains that need attention or are under investigation, such as Beta (first discovered in South Africa) and Alpha (first discovered in the UK) or Delta mutant virus strain (first in India was found).
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2. Can the new crown vaccine effectively protect against new variant viruses?
According to the SAGE paper, the new variant virus strain is more resistant to vaccines and antiviral drugs, and mortality may increase even after vaccination.
The text states that this situation "almost certainly" will happen.
SAGE also pointed out that there is a scenario where a mutant virus strain can evade existing vaccines, because the so-called "antigenic drift" situation "almost certainly" will happen.
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3. Does the patient with the Delta variant virus have no cough symptoms?
British statistics found that the symptoms caused by the Delta variant virus seem to be different from the previous virus strains.
According to data from the Zoe Covid Symptom study of the new coronary pneumonia in the United Kingdom, patients with pneumonia since May will have more headaches, followed by sore throat, runny nose and fever.
Coughing has become rare, and loss of smell is almost gone
.
Some experts worry that patients will misunderstand that they are suffering from a bad cold instead of new coronary pneumonia, delaying treatment and increasing the chance of spreading to others.
▼ In the same scene: A cold is generally an upper respiratory tract infection, while patients with new coronary pneumonia will have lower respiratory tract symptoms. Both will have symptoms such as fever and sore throat, which are easy to confuse. In addition to fever, what are the different symptoms of new coronary pneumonia from colds and flu?
One article to understand the 5 differences between new coronary pneumonia and a cold
(click the picture to understand 👇👇👇)
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4. The Delta variant virus has a longer incubation period?
Associate Professor Hsiao Jieheng of the Department of Medical Technology and Information Sciences of PolyU said on a program in Hong Kong and Taiwan that the incubation period of the variant virus is 3 days on average, but it can be as long as 21 days, while the high viral load of patients with the Delta variant virus can be maintained for 18 days, increasing the spread in the community. risks of.
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5. Young people are more susceptible to infection?
As of June 26, there were 18,000 newly confirmed cases in the UK, almost all of which were cases of the Delta variant virus.
But unlike past outbreaks that mainly infected the older generation, the new Delta variant mainly infects young people.
According to research conducted by Imperial College London, in this outbreak, the proportion of young people infected was five times that of the older generation.
▼In addition to changes in symptoms of Delta variant virus, why is it said that young people are susceptible to infection?
The spread of mutant viruses is even more amazing?
(According to the picture 👇👇👇)
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However, this may be related to the fact that vaccination is mainly concentrated in the older generation, because the vaccination rate of young adults is lower, and the Delta variant virus is more likely to spread than the Alpha variant virus found in the UK, and young people have higher mobility and exposure. More people increase the risk of infection.
Related Article: New Coronary Pneumonia | Delta Variant Virus Young People's Susceptibility to Infection Symptoms Are Different from the Past
6. Stronger dissemination power?
Compared with the traditional new coronavirus strain, the recommended social distance is 1 meter, the Delta variant recommends staying more than 2 meters.
But experts warn that even if they are separated by 2 meters, they will only reduce the risk of infection, and it does not mean that they will not be infected.
Some Japanese experts pointed out that the Delta strain in India has a 10% chance of being infected even if it is 2 meters away.
U.S. media quoted an internal document from the Centers for Disease Control and Prevention (CDC) on July 29 to report that Delta, a variant strain of the novel coronavirus pneumonia (COVID-19), is as infectious as chickenpox, and people should be cautious.
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7. Is the virus stronger?
The same building became a "close contact person" 4 days before the onset of illness?
Zhong Nanshan, a Chinese epidemic prevention expert, pointed out that the definition of "close contacts" may no longer apply. "In the same space, in the same unit, in the same building, in the same building, four days before the onset of illness, these people who got along with these patients It is in close contact.” This is different from the previous definition of "close contact": two days before the onset of illness, family members who were with the patient and employees in the same office had a different behavior such as eating and meeting together within one meter.
Related article: Delta variant virus | 2 meters social distance still has a 10% infection rate 4 days before the onset of close contact
▼Patients with new coronary pneumonia will have other uncommon symptoms. If they are not concerned, they are easy to ignore (according to the picture 👇👇👇):
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Will the vaccine work against the Delta variant virus?
According to statistics collected by the Scottish Public Health Agency and published in the authoritative medical journal Lancet, at least two weeks after the second dose of vaccination, the protection rate of Pfizer vaccine against Alpha mutation is 92%, which is the protection of Delta The rate dropped to 79%; while the protection rate of the Oxford AstraZeneca vaccine against Alpha dropped from 73% to 60% of the Delta protection rate.
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