Wang Xiaoxiao enthusiastically explained, "Our CDC does not vaccinate now, if you want to get vaccinated, go to a community hospital." ”

"Where my little grandson gets vaccinated?"

"Pediatric vaccination sites are not usually the same as adult vaccination sites, and I have the phone number of vaccination sites in each community, both for children and for adults, and you can choose according to the distance you travel."

Wang Xiaoxiao took out a promotional paper with a contact address and handed it to the old lady, and finally her eyes fell on the little boy on the trolley in front of the old lady.

The little boy is no more than two years old, and he should not have started kindergarten yet.

"Auntie, this is your grandson, have you been vaccinated with the tetanus-pertussis triple vaccine?"

"I've been vaccinated, now the children are all babies, the country's free vaccines have all been vaccinated, and we have also been vaccinated with a lot of self-funded second-class vaccines."

The old lady pushed her little grandson away with a brochure, and several more people came to consult.

Most of the people who were consulted were elderly, most of whom were born before 1978, who had not been immunized and whose body's resistance to Corynebacterium diphtheria was weak.

Wang Xiaoxiao suddenly thought of an idea and called Gu Yanan, "Sister Yanan, I am now here in the Little Red Flower Kindergarten, and many elderly people in nearby residential areas have come to inquire about the vaccination status of the Baibai Tetanus-Pertussis triple vaccine, are we going to give the elderly in the neighborhood a general immunization?" ”

Gu Yanan had finished the investigation at Director Li's house, and did not go back to the emergency office, but went to the laboratory building to see the growth of Corynebacterium diphtheria with Section Chief Li of the Laboratory Department, and at the same time prepared to do the sequencing work of the isolated strains in the sequencing center.

Regarding Wang Xiaoxiao's proposal, Gu Yanan already had a plan in his heart.

"I am also thinking about this issue, compulsory vaccination will cause disgust among the masses, I will first post an epidemic notice on the center's website, recommending that people who have not been vaccinated against diphtheria be vaccinated, and those who have already been vaccinated are recommended to be boosted."

"Well, this plan sounds more feasible, and I'll give feedback to the people who consult here."

——

8:30 a.m. on the third day.

Lianhai Center for Disease Control and Prevention, Experimental Building, Sequencing Center.

Gu Yanan obtained the full genome sequence of the isolated strain of this diphtheria epidemic.

After genetic comparison analysis, it was found that the diphtheria strains isolated in this outbreak did not have much variation from the genetic sequences of diphtheria strains preserved more than 30 years ago.

Corynebacterium diphtheria is indeed a relatively stable bacterium, which has been dormant in nature for decades and has not changed much, and this time it reappeared in the human world because the immunity of some people has decreased.

Gu Yanan was comparing the results of the experiment, and Section Chief Li of the Laboratory Department ran over from the laboratory next door excitedly, "Director Gu, a major discovery, the nucleic acid of Corynebacterium diphtheria was detected from the facial tissue collected by Director Li's house, and the strain is being isolated and cultured. ”

Section Chief Li said that it was a major discovery, although it was an exaggeration, but it was indeed an important discovery for this epidemic.

With this test result, it is possible to trace back to the original source of infection.

Three days later.

The lab got the diphtheria strain isolated from the tissue.

Gu Yanan immediately did whole-genome sequencing, and after gene comparison, it was found that the genetic homology of the diphtheria strain isolated from the facial tissue was 100% with the diphtheria strain isolated from the eyes of Elder Li Yuan's wife.

This shows that the facial tissues of Director Li's house are the source of infection of this diphtheria epidemic.

——

Another week later.

Mr. Li, who had the most severe symptoms in the outbreak, recovered and was discharged from the hospital after treatment.

Lianhai Center for Disease Control and Prevention, Emergency Office.

Gu Yanan is writing a summary report on the diphtheria epidemic.

Teacher Li, the principal of Xiaohonghua Kindergarten in Binhai District, Lianhai City, bought a batch of facial tissues without production logos from the street and used them at home.

Low-quality facial tissues contain Corynebacterium diphtheria.

Li Yuan's wife had never been vaccinated against diphtheria, and after wiping her eyes with low-quality facial tissues, she was infected with Corynebacterium diphtheria in her left eye.

Mr. Li was infected by his wife, and at the same time, he transmitted the bacteria to the kindergarten child Lele at work.

Mr. Li had typical symptoms of pharyngeal diphtheria, with a large amount of yellow-white pseudomembrane in his throat, his neck swollen like a cow, and symptoms of diphtheria toxin poisoning all over his body.

Lele has a short duration of infection, with gastrointestinal and upper respiratory symptoms.

The three were hospitalized and discharged one after another.

During the investigation of the tissues in question, the source of production of the tissues in question was not identified because they were purchased from roadside vendors.

The investigation of the staff and children of Xiaohonghua Kindergarten found that no one else was infected.

In response to the epidemic, emergency measures were taken to prevent and strengthen the vaccination of high-risk groups involved in the epidemic.

No new cases were detected in two weeks, and the diphtheria outbreak was brought under control.

Report archiving.

——

That night, Gu Yanan returned to Xinhua Apartment alone after work.

Downstairs in the garden, I saw two familiar figures.

Xiao Chu and his elder brother Chu Qingfeng stood in the garden chatting.

Gu Yanan didn't want to know the privacy of the two brothers, so he didn't plan to listen to the corner, and was about to go upstairs directly, but found that the way the two talked was a little strange.

Although the two brothers didn't speak loudly, Gu Yanan could feel that Chu Qingfeng's state was a little irritable.

Xiao Chu is usually a very easy-going person, but at this time he has a serious expression.

Could it be that the brothers quarreled again?

Gu Yanan still remembered that the first time he saw Chu Qingfeng, it was when the two brothers were arguing.

At that time, she didn't know the situation, thinking that someone was bullying Xiao Chu, so she went up directly and beat Chu Qingfeng down.

It's only been a few months, and the two are arguing again?

Worried that Xiao Chu would be beaten, Gu Yanan stopped and stood by the garden, vaguely hearing the conversation between the two brothers.

"Brother, I don't care what your idea is, anyway, you can't get close to her anymore!" Xiao Chu spoke very seriously, faintly with a hint of anger.

Chu Qingfeng sneered, "Brother, are you intimidating me?" ”

"Whatever you want."

"You still treat her as your own sister? I'm the brother who grew up with you, where did you put me? ”

"I've always treated you as my own brother, but what about you? You've changed since you knew about that. ”

Chu Qingfeng suddenly grabbed Xiao Chu's collar and began to roar, "It's not that I've changed, it's you who have changed, isn't it...... It's that they've treated me differently since I was a kid, I'm just a substitute......"

Gu Yanan watched from the sidelines, is this really going to fight?

She coughed deliberately to alert the two.

Hearing the familiar voice, Chu Qingfeng's face immediately changed, and a smile appeared on his face, which was still distorted by anger, and the hand holding Xiao Chu's collar was put on Xiao Chu's shoulder again, and the situation that was supposed to fight immediately changed to the good appearance of the two brothers.

"Yanan, why are you here?" Chu Qingfeng asked with a smile.

"Passing home, you two are here?"

"Chat." Chu Qingfeng replied without changing his face.

Looking at Xiao Chu again, he was also full of smiles, "Well, it's chatting." ”

Since the brothers don't want to tell the truth to outsiders, Gu Yanan doesn't want to ask either, as long as they don't fight.

"Oh, then you guys keep talking, I'm going upstairs."

Seeing Gu Yanan's back leave, Chu Qingfeng withdrew his hand, and the brothers glanced at each other and stopped talking.