Li Jiahui talked about her experience before the onset of the disease, "I just came back from Africa a week ago, and since I came back, I have been busy working in the company, staying in an apartment near the company at night, and this morning I went to see my brother in the villa area in the western suburbs, and then suddenly I started to have a fever, itching, coughing up blood, and a headache. ”

Gu Yanan examined Li Jiahui's exposed skin, and there were many unsubsided blisters on her arms and legs, which were typical of hives.

This is an allergy symptom.

Gu Yanan asked Li Jiahui, "The case says that you are allergic to peanuts?" ”

"Well, I'm allergic to peanuts, so I'm very careful about my diet, and I'm sure I haven't eaten peanuts this morning, and I've not been exposed to any peanut-related foods."

Gu Yanan: "Miss Li, please write to us the address of your company, the apartment near the company, and your brother's villa in the western suburbs, as well as the list of people you have been in contact with in the past week." ”

"You're going to check on my company and apartment?"

"Yes, in addition to that, the location of your illness, which is your brother's villa in the western suburbs, is the focus of our investigation."

Li Yixuan: "It's not the first time that CDC has gone to check my villa, what is going to be checked this time, I will cooperate, will you go now?" ”

Gu Yanan estimated in his heart that Mrs. Zhang's flow survey next door had not yet been completed, and it would take time for the sample to be tested.

"I'll go early tomorrow morning, and I still have the basic flow to do tonight."

After asking for basic information about the epidemic, Lu Li took Li Jiahui's blood sample and prepared to send it back to the CDC laboratory to test the malaria parasite DNA, which is the most reliable way to determine whether Li Jiahui is infected with malaria.

Mrs. Zhang's hospital room.

The old man on the hospital bed had fallen into a coma, and another nanny was accompanying him at the bedside.

Mr. Zhou and Mr. Gao Fei discussed Mrs. Zhang's condition with Dr. Zhao, the head of the oncology department.

Dr. Zhao frowned, looking very worried, "Mrs. Zhang's disease progressed rapidly, the symptoms of pneumonia were serious, and she had acute respiratory distress syndrome just now. ”

Mrs. Zhang couldn't answer the question, and Mr. Zhou asked the nanny who was accompanying her bedside, "Did the old lady come into contact with anything special before the onset of the disease?" ”

The nanny shook her head, "Nothing special, my old lady just had surgery not long ago, and she hasn't been out much recently, she basks in the sun on the balcony every morning, takes a nap at noon, and eats three meals a day, every day." The old lady was the same as usual on the day of her illness, she began to rest after lunch at noon, and slept for more than an hour, when she got up, the old lady said that she was dizzy, I took a thermometer to measure her temperature, more than 39 degrees, I thought it was a cold, but I didn't expect the old lady to suddenly cough up blood again, I panicked, so I called 120 to call an ambulance. I'm just a nanny, and I usually do my best to take care of it, so why should something happen? The old lady's own son is rushing here, and should be there soon. ”

The babysitter said a lot, but there weren't many useful clues.

Zhou Lao felt the need to go to Mrs. Zhang's house to check.

In another infectious disease ward, Li Xiaohua, the sick nanny of Mrs. Zhang's family, was lying on the hospital bed.

Several members of the emergency team and Gu Jiashu asked the nanny some questions in the ward.

Nanny Li Xiaohua was conscious, talking about the experience of the day of the onset, "I am the live-in nanny of Mrs. Zhang's family, usually responsible for cleaning the entire villa, but also cooking, this morning there were a few renovation workers at home, knocking and beating in the basement, the old lady thought they were noisy, asked them not to start work during the noon break, after the nap, the old lady was sick and sent to the hospital, but there were still workers at home to work, so I stayed in the villa." By the end of the evening, I was starting to feel sick, feverish, nauseated, and had a strange sweet taste in my mouth. ”

When Gu Yanan asked Li Jiahui just now, he had heard her say that there was also a strange sweetness in her mouth.

If there is a similar symptom, is there the same cause?

Li Jiahui and Mrs. Zhang both live in villas in the western suburbs and may have been exposed to some of the same pathogens.

Is it food? Or water? Or some other chemical?

Gu Yanan asked the nanny, "Do you eat the same thing as Mrs. Zhang and the other nanny at home?" ”

"Well, it's all about the same, Mrs. Zhang is very good to us, except for the supplements she eats herself, the three of us eat the same daily meals."

If three people have eaten the same food and only two people get sick, then it is unlikely that there is a problem with the food.

On the day of the onset, the situation was different from usual, and there were renovation workers.

Could it be that the workers brought some toxic substances during the renovation?

Gu Yanan asked: "When did the workers' work in Mrs. Zhang's villa begin?" ”

"It's around 7:30 a.m. today."

"Did the workers go to the villa yesterday or the other day before?"

"No, this renovation seems to be carried out in a unified manner, in addition to the owner's home, there are many workers in the green belt and fitness plaza of the community to install equipment."

The unified project in the western suburbs villa area, that is, Li Jiahui, Mrs. Zhang, and Mrs. Zhang's nanny have common exposure factors.

As for the specific exposure to harmful factors or pathogens, it is necessary to go to the scene for investigation.

Gu Yanan originally planned to wait for the test results of the disease control laboratory to come out, and then go to the scene the next morning, but now it seems that this incident is likely to be related to the unified construction of the community, so residents and workers who have been in contact with the construction environment may become ill, and the cause of the disease must be found as soon as possible.

Gu Yanan decided to go to the western suburbs villa area overnight to check.

——

9:40 p.m.

Villa area in the western suburbs of Lianhai City.

The on-site flow shunting of the Municipal Center for Disease Control and Prevention was parked at the gate of the villa area.

Although it was night, the villa area was brightly lit and a construction team was working in the community.

Piles of pipes and iron plates blocked the road, and not far from the construction site, there was a flickering welding light and blue-white smoke rising with the light.

The community security guard stopped the emergency response team, and Gu Yanan showed his work card.

When the young community security guard saw that it was someone from the CDC, he immediately let him go, but he couldn't help but gossip and asked, "Comrade CDC, I want to ask, is there any infectious disease in this community, three ambulances came one after another today." ”

Zhou Lao approached the young security guard and said with a smile, "We don't know, so let's check, it just so happens that I have something to ask you for help." ”

Zhou Lao took out a piece of paper, and there were two addresses on it, which were the addresses of Li Yixuan and Mrs. Zhang's house, "You help us lead the way and find these two households." ”

The young security guard was happy to help.

Bypassing the construction site, the security guard led the CDC emergency team along the path to Li Yixuan's home.

On the road, several workers were welding and cutting metal plates, and the air was filled with a choking smell of metal.

The welding workers were busy with occupational protective masks, Lu Li looked at the construction site curiously, and was slapped by Wang Xiaoxiao and reminded, "The light of welding metal will hurt your eyes, don't look around." ”