Hearing the news, Nan Zhiqiao was not surprised, but just asked, "How did you deal with the corpse?"

Attending doctor: "After obtaining the consent of the family, it will be cremated directly." ”

Nan Zhiqiao didn't say anything more, but the attending doctor explained on the other end of the phone: "When the patient was sent, he had already had multiple organ failure, although the pathogen was detected and a large number of antibiotics were used, but the development of the disease was not curbed, and the patient had septicemia plague after the pneumonic plague, septic shock, diffuse intravascular hemorrhage, and the patient had heart valve surgery, and finally died of heart failure." ”

Nan Zhiqiao answered the phone with one hand and held the information filled in by the male passenger in the other, and the past medical history column said "none".

Nan Zhiqiao frowned slightly, thinking, it seems that this information is not written in detail, how can we know what places the male traveler had been to before the onset of the disease?

Ye Zhenzhen followed Nan Zhiqiao's side, heard Nan Zhiqiao mention the problem of corpse disposal just now, and inferred that the plague male passenger had died, and then thought that Nan Zhiqiao was going to ask the male traveler just now, and now that the person is dead, Nan Zhiqiao naturally frowned.

Zhen Zhen's mind flashed the situation of sending the male passenger to JS Hospital, when the male passenger's camera fell to the ground, and Zhen Zhen picked it up and sent it to the hospital together.

Since the male traveler went to Tibet to take scenic photos, there must be clues to where he has been in the photos.

Zhen Zhen whispered to the side, "Camera!"

Nan Zhiqiao immediately understood, and asked the attending doctor on the other end of the phone: "Is the deceased's camera still in the hospital?"

"In. ”

"Okay, I'll go over right away and don't let anyone else touch the camera. ”

——

Nan no Qiao and Zhen Zhen are in JS Hospital and find the male traveler's camera.

The photos in the camera are all some scenic photos, local characteristic buildings, palaces, temples, houses, and more natural scenery, endless grasslands, blue sky, white clouds, herds of cattle and sheep, five-colored prayer flags fluttering in the wind, and dotted herdsmen's tents......

Although there are many photos in the camera, and they are all Tibetan landscapes, there are no photos that can show the specific location.

Zhen Zhen sighed: "I can't see anything, it's all grassland scenery." ”

Nan Zhiqiao: "There are grasslands, cattle and sheep, and herdsmen, which means that this is a plateau pasture somewhere in Tibet. Look at this one again. ”

Nan no Qiao fixed the camera frame on one of the photos.

In the photo, a cute little animal is in the center of the shot, with the spring green savannah behind it.

Zhen Zhen stared at the photo, a large fluffy yellow-brown mouse crouching on the mound, a pair of small black eyes, staring warily around.

"It's a marmot!"

Ye recognized the animals in the photo, marmots are large, stout rodents that live in grasslands, low mountains and hills, and feed on young shoots and roots. Hibernate in winter, stinging in March and April every year, and like to be active in the morning and evening. Cave dwelling in clusters, strong digging ability, generally digging holes under rocky slopes and valley bushes, deep and complex tunnels.

When marmots are active, there will be a vigilance, and large marmots will sit on the marmot mounds and watch, and make a warning sound when they encounter danger.

The marmot in the photo is sitting on a marmot mound, holding its two front paws, looking warily in the direction of the camera, surrounded by several small marmots gnawing on blades of grass.

Nan Zhiqiao: "Marmots are an important reservoir for plague, and the deceased had contact with marmots' living quarters before his death, which may have been a way for him to be infected by Yersinia pestis. ”

Ye Zhenzhen remembered that when she first entered the Nanzhiqiao experimental group, she had read all the materials in the laboratory, which contained about plague, and Tibet included several natural foci of plague, "Senior Nan, compare the scenery in the photo with the natural foci of plague in Tibet, and you should be able to find the specific places he has been to." ”

"You can give it a try. ”

The two returned to the CDC laboratory and found out the epidemic data of plague in Tibet over the years.

A careful investigation revealed that more than 30 townships in Tibet were natural foci of plague, and more than half of them were plateau pastures.

As a result, it is still not possible to determine where the male traveler visited during his lifetime.

Ye Zhenzhen: "Another way is to check whether there have been any cases of plague in Tibet recently. ”

Nan Zhiqiao turned on his work computer, entered his username and password, and entered the epidemic system.

Looking at the Tibetan region in the system, there are zero reports of plague cases.

Nan Zhiqiao and Zhen Zhen glanced at each other, and Nan Zhiqiao's questioning eyes seemed to ask, "What should happen next?"

Ye Zhenzhen: "Let's see if there are any reports of deaths of unknown causes, Tibet is remote, and the test results may be delayed. ”

A check in the epidemic system shows that there is indeed a cluster of unexplained deaths reported in Tibet.

The process of case detection and reporting is as follows:

On the morning of April 14, the disease control department of L County received a report from the G Township Health Center that five people in M Village of the township had died of acute death of unknown causes. The county CDC also reported the outbreak to the state health department.

The disease control department of L County sent three epidemic prevention personnel to M Village at 2 a.m. on April 16, and with the cooperation of a doctor from a township hospital, the death was verified.

From March 20 to April 16, seven people died in M Village, all of whom died three days after the onset of the disease, and the seven deceased were distributed among four households.

The first fatal case was a village doctor, while the others were ordinary herders.

None of the deceased went to the hospital and were related to each other in their families or relatives.

The village chief and the local people suspect that it is a familial infectious disease, and that the cluster of unexplained deaths has caused a great deal of panic in the local area.

In the epidemic network, there is only a simple content of the case discovery and report of this incident, and then there is the basic clinical information of the deceased, and the main clinical manifestations of the 7 death cases are basically the same: sudden onset of fever, body aches, severe headache, cough, blood in the sputum, and dyspnea.

There were no laboratory test results, so the nature of the event was tentatively classified as a cluster of unexplained deaths.

After reading the news on the Internet of the epidemic, both of them were silent for a while.

Ye Zhenzhen: "I don't know if there is any connection between the plague patients found at the airport and this cluster of unexplained deaths in M Village, L County, G Township, Tibet. ”

Nan Zhiqiao tapped his finger on the computer screen, "G Township is located at the western end of the Qinghai-Tibet Plateau, it is a typical plateau pasture, and the scenery attached to the photos in the camera, the two are likely to be connected." ”

Ye Zhenzhen: "It's easy to be sure, just make a phone call and ask the local disease control department to see how far the incident has been handled." ”

Digging out the phone books of disease control in various places, Nan Zhiqiao directly dialed the phone number of the Tibet Autonomous Region disease control.

Two years ago, Nan Zhiqiao participated in the construction of Xinjiang aid, and the location of counterpart support was Tibet, and during the more than half a year of aid, he stayed at the Tibet Autonomous Region Center for Disease Control and Prevention for more than two months, and spent another few months in various cities, counties and townships in Tibet.