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Chapter 983-2 D-day

This chapter is the 11th chapter updated for the lord Nebula Ruoyu. Since June has not been completed, there are still 2 chapters to be updated after this chapter...

December 27 of the Jihai Year
No one living in this era can foresee that one day they will face the horror of 17 years ago again.No one could have imagined that a plague could come back to the world in this era of scientific prosperity and technological progress and threaten the life that everyone loves.

Academician Zhong confirmed everyone's last worry in an interview with CCTV, "There is clear evidence of human-to-human transmission, and medical workers have already been infected."

Academician Zhong also put forward two proposals during the interview, "It is not necessary, do not go to Yunhe" and "Residents of Yunhe, there is no need not to leave Yunhe".

When Sun Lien saw this interview, his heart turned cold.

Infectious diseases have three classic elements, the source of infection, the route of transmission, and the susceptible population.The control of infectious diseases also needs to start with these three classic elements.

Elimination of Aedes albopictus can block the source of infection of dengue fever; eradication of snails can block the source of infection of schistosomiasis.The eradication of rats and fleas can control the transmission of plague; waterworks and sewage treatment plants can control the transmission of cholera.

Protecting vulnerable populations is more common, giving children sugar pills to protect them from polio, and DPT to immunize them against whooping cough, diphtheria, and tetanus.

At the same time, recommending that people wear masks during the epidemic period of influenza is also a major method to protect susceptible people.

But this time... Academician Zhong's two proposals were not quite... satisfactory.

Do not go to Yunhe unless necessary, which means that all groups of people may be susceptible groups.It's not necessary not to leave Yunhe... It's almost to control the residents of Yunhe as a way of transmission.

Under normal circumstances, it is simply impossible to control the residents of a certain place as a transmission route.Yunhe is the capital city of Xiangbei Province, with a population of more than 1000 million.And Yunhe itself has an extremely advantageous geographical location. In addition to straddling the Yangtze River, it is also a transit point for several main railway lines from east to west, from north to south.

An epidemic broke out in this location, and the timing happened to be during the peak period of the Spring Festival travel... The consequences were unimaginable.

And what's worse, appealing to... won't do any good.

Yes, many people will know that some invisible viruses are spreading in the city of Yunhe.For the safety of all, it is best not to travel to this city, or travel from this city to other cities.

But many people's actions won't be entirely swayed by the advice.In all fairness, not many people will stop their Spring Festival trips that have been planned for several months or even longer because of this suggestion.Not many companies would stop allowing their employees to travel on official business because of Yunhe's situation.

Not to mention those who have been working in Yunhe for a year, bringing their savings and purchases for the New Year, and rushing home to prepare for the New Year. New Year's goods?
Let them give up this plan and celebrate the new year in Yunhe... This is really difficult to almost impossible.

However, Sun Li'en couldn't think of a more suitable way to solve this problem for a while.

Today is the 27th of the twelfth lunar month, and there are three days before the Chinese New Year.The PCR reagents developed in the laboratory are not accurate enough, and the output is extremely limited.Yunhe's local PCR testing capacity is also seriously insufficient, and testing local patients alone is enough for them to have a headache.It is simply impossible to conduct a PCR test on every passenger leaving Yunhe.

And a large number of passengers going to Yunhe also need to undergo PCR testing when they leave-this is a dynamic process.Even the most advanced and accurate PCR kits cannot be 100% accurate.During the sampling process, there may be problems affecting the accuracy.After all... It is impossible to set up a bronchoscopy room at all exits from Yunhe, and perform tracheal lavage sampling on all people who leave Yunhe.

Fortunately... today is not just head-scratching news.Sun Lien gradually discovered that active work still has results.At least the results at work can dilute some of the haze in my heart.

Zeng Xia's condition began to stabilize, and a recent CT scan of her lungs showed that her lung lesions had begun to absorb.The level of C-reactive protein dropped to half of what it was at the time of admission.Even without oxygen inhalation, the blood oxygen level can be maintained at around 95%, which can be said to have made great progress.

Although further treatment is needed to consolidate the current achievements and prevent recurrence of the disease.However, Sun Lien and his comprehensive diagnostic center can proudly claim that they prevented a case of novel coronavirus pneumonia from turning from severe to critical.

The second piece of good news came from Shen Xi.After repeated experiments and improvements, they successfully produced the first quick test strip for the new coronavirus.

Unlike PCR kits, quick test strips can be tested without the aid of a PCR detector.The sensitivity is also quite good - in theory, such a detection method can reach an accuracy of 90% or even higher.

The test strips produced in the laboratory adopt the double-antibody sandwich method, which absorbs the test sample with the antigen to the direction of the antibody through the capillary action of the test paper. After the combination of the antibody and the antigen, the antibody-antigen complex is absorbed by the T-line The coated antibody was captured, followed by aggregation and color development.

The accuracy rate of the test strip has reached 65% by using the blood samples of the confirmed patients transported by Yunhe.By testing the negative control blood samples from Ningyuan Blood Station, no false positives have been found so far.

But... Sun Lien is not particularly optimistic about the prospects of this project.The reason is also very simple-after blood samples were taken from six patients admitted to the Fourth Hospital for examination, the results were not satisfactory.The samples of Zeng Xia and Zhou Yuze were tested a total of six times, all of which were negative.

It has been a little over four days since Zeng Xia was infected, and the level of antigen contained in her blood sample does not seem to be high enough.Zhou Yuze, who was asymptomatic, also had a relatively low antigen level.

This is why Sun Lien is worried. Now it seems... patients infected with the new coronavirus do not seem to have a lot of antigens in the blood immediately.This has cast a shadow over the application prospects of quick test strips.

The advantage of the quick test strip is that it can be tested quickly without relying on a PCR machine, which should have been a good method for large-scale screening.

But if ... if people with the novel coronavirus don't have enough antigens in their blood soon enough, the test strips are pretty much moot.

Two bad news, one good news.Sun Lien's mood... also fluctuated a little.

(End of this chapter)