The three colors of black, red, and yellow are clearly distributed on the map into three rings, like ripples spreading out in circles.

And the center of the ripples is where the black dots gather.

"A lot of people have died in this place of Nanhu Lane...... Sister Mei couldn't help but sigh.

Lu looked at the map slightly, and was puzzled: "It's strange, why is it here?" ”

"It's really strange that the experimental base is in the south of the village, but from the map, Nanhu Lane is located in the west of the village." Chen Yan said, "Water pollution has been eliminated, soil pollution is impossible, if there is a problem with this soil, other people will have an accident a long time ago, and the testing agency will also find the problem, and now only airborne infection and biological contact infection are left." ”

Sister Mei blinked her eyes and asked him, "What do you mean?" ”

"I'll give you an analogy." Chen Yan pointed to the location of the experimental base on the map, swiped upward, and stopped at the west side of the village, "Is it possible......?" A mouse carrying a pathogen escaped from the experimental base and accidentally entered the village, causing a large number of villagers to be infected. ”

Lu frowned slightly, "If it is an experimental rat or rabbit, the infection route should be irregular and tortuous and changeable, not radiating from one point to the surroundings like now." ”

Chen Yan bowed slightly: "Then now there is only one possibility left, air infection." ”

"What's the deal with airborne infection?" Sister Mei asked.

"Let's use the analogy of a guinea pig." Chen Yan explained, "A guinea pig carrying a pathogen ran out of the experimental base and died in this place after entering the village—"

He nodded to the black area again, "The dead rat carcasses were not disposed of in time, and the virus spread with the air to the surrounding area, causing what we see now." ”

"How long did it take to drive when we came from the experimental base?" Sister Mei looked at the two of them and didn't quite agree with Chen Yan's guess, "There are seven or eight minutes, right?" If this distance is to walk, it will take at least two hours to walk continuously, let alone a mouse with no clear direction? ”

"It doesn't seem like my analogy is the right one." Chen Yan shrugged his shoulders indifferently, "There is still a large forest on the periphery of the experimental base, this is not an urban area, and weasels and owls in the wild, as well as free-range cats in the countryside, will pose a threat to the mice." With so many predators and such a long distance, it is indeed impossible to run into the village. ”

Lu listened to their discussion slightly, and was also full of doubts, "Don't forget, the mice used in the experiment have been living in a sterile environment, kept at a constant temperature, and their survivability in the wild is almost zero. ”

Sister Mei smiled helplessly, "I don't understand, according to this analysis, there is only one possibility, someone in the experimental base deliberately brought a sick mouse into the village." ”

Lu moved slightly, and looked at Sister Mei: "It could also be ...... Someone in the village, who took the rats from the experimental base? ”

Chen Yan sighed: "You two, don't go to rats, the poison in the experimental base may not be mice, it may also be other things, anything with a spreading nature is suspicious." ”

"That's right." Lu smiled slightly, "Let's go to Nanhu Lane to see the situation." ”

The three of them put away their things and got out of the car and walked towards their goal.

The closer you get to the black zone, the quieter the surroundings and the more eerie the atmosphere.

clearly looked at the houses one after another, but there was no one for a long time.

Sister Mei looked at the houses on both sides of the road and muttered, "It seems that no one lives." ”