It's not that difficult to open a hospital in another world, right?

"Oh, it's so lively!"

City Lord Qiao An walked in unsteadily. The people on both sides were at war with each other and looked at each other angrily, but he seemed to be unaware of it and looked around with a smile all the way. If he dyes his beard white and lengthens it three times, he can be cosplayed as Santa Claus.

"Lord City Lord."

"Your Majesty the Viscount."

Everyone present gave mixed greetings. Viscount Joan waved this way, nodded his head that way, and walked all the way to the center of the crowd. He stood still, stroking his beard and looking at Grete:

"I remember you. You are the disciple of Elder Erwin that...that person from last Midsummer Festival, right?"

"Grete Nordmark, salute your Excellency." Grete bowed his head and saluted. Viscount Joan waved his hand scribbledly:

"Well, you said there is evidence? Where is it? That bottle? Show me!"

"Seeing it requires tools." Gretel looked around: "Lord City Lord, if you allow me, I would like to find a brightly lit room to show you the evidence."

"Then what are you waiting for! Come in quickly!" Viscount Qiao An walked towards the Spring Temple. After taking two steps, he turned back in surprise: "What are you doing?"

Gretel rolled up the hem of her robe and was lying on the edge of the fountain, stretching her arms to scoop up the water in the fountain...

"The evidence is in the water of the fountain, Lord Viscount." Gretel went into battle in person, just to attract the attention of the city lord. After achieving his goal, he immediately stopped and stood up:

"Of course, for the sake of justice, it would be best if you send guards to get water. Or," he curled his lips and suppressed a smile:

"You can also get water from the priests of the Spring Water Temple..."

The bald bishop burst out laughing. Elder Erwin did not laugh out loud for the sake of his apprentice, and his white beard also twitched under the firelight. High Priest Horner's face was as black as the bottom of a pot. He snorted and had to say to the Lord of the City:

"Please, sir, send guards to get water!"

"Remember to wipe the mouth of the spray bottle as well——"

Gretel walked in among the crowd, and while racing against time, he turned around and shouted...

A large group of people entered the temple. Grete set up a microscope, and Viscount Joan stepped up to take a look, and his eyes lit up.

"Interesting, really interesting..." He walked around the microscope and exclaimed, sometimes putting his fingers over it, sometimes tugging on a sleeve, sometimes pulling out a hair and putting it up to look at. After struggling for a full quarter of an hour, he remembered the guard standing beside him and waved:

"Just use this thing to see things in the water? Bring it here!"

"Uh, it's not..."

Gretel sweated. Boss, bacterial culture, fixation, staining, nothing has been done! What can be seen through microscopic examination alone?

Fortunately, Viscount Joan, who got a new toy, was very patient and let him play with it. Gretel gave an order, and the priests from the Natural Gods Church and the Temple of the God of War came in two rows with a command and an action.

Coupled with Elder Erwin's bacterial growth-stimulating technique, it didn't take long for the dyed bacterial samples to be delivered piece by piece to the city lord.

High Priest Horner walked around anxiously, but he couldn't help but lift the table and couldn't find any reason to stop him. Viscount Joan took matters into his own hands and fixed the glass pieces on the stage. He closed his eyes and looked at them one by one:

"This has!"

“There’s this one too!”

“There’s this one too!”

"This one doesn't have...oh, this one is made with cold boiled water..."

"This is the one that has been wiped on the mouth of the fountain bottle..." As he watched, Viscount Joan's face slowly darkened, and he turned to High Priest Horner:

"Come and see for yourself!"

High Priest Horner reluctantly came over. Grete took a few steps back and watched him finish observing one piece of glass and then another piece of glass. His brows furrowed tighter and tighter, and his hand movements became faster and faster. Beside him, Elder Erwin pulled him quietly and said with worry:

"Little Grete, what if he says that we did all these things and that we harmed him?"

"Then ask him to do it himself." Gretel raised the corner of his mouth. Teacher, you are so considerate... I was in need of someone to compliment me, so here you are...

"He collected water samples by himself, cultured them by himself, made smears and dyed them by himself. Don't worry, teacher, I guarantee that as long as the steps are correct, the products will be exactly the same."

"That...that magic..."

"You don't need to use magic, just leave the aspic for 24 hours and it will be the same."

As for bacteria, if they exist, they exist, and if they don’t exist, they don’t exist. If you can see it, others can also see it, and you can’t deny it. This is the principle of repeatability of scientific experiments. Are you going to bite me?

Gretel became more confident every sentence. High Priest Horner's face turned darker and darker, and he finally threw down the glass piece in his hand and roared:

"So what if you have this thing? It's a little bigger, you don't need this - this -"

"Microscope." Grete prompted the words right next to him. Elder Erwin almost laughed: You might as well not mention it!

Sure enough, High Priest Horner glared at Gretel fiercely. After staring, he remembered and continued roaring:

"So what if you find something that you can't see without a microscope in a fountain? There are too many small things in this drop of water! Why do you say it caused the plague? Not something else? Why do you think it caused the plague? What, it’s not like the poor themselves are sick?!”

There was a sudden silence in the temple. Lord Joan was stunned for a moment. The bald bishop scratched his head. Elder Erwin instinctively wanted to answer. He opened and closed his mouth and looked at Gretel:

...Yes, why do you say that this gadget can make people sick and spread the plague?

Gretel suddenly smiled. With a chuckle, he confidently took a step forward and held his head high:

"Of course I have a way to prove it."

At his request, Viscount Joan's guards turned around and went out, carrying ten rabbits. Eight were healthy and two had diarrhea. High Priest Horner, Bald Bishop, Elder Erwin, and the three leaders of the cult took turns to treat the healthy rabbits with healing techniques over and over again until they were sure that there were no problems. Under Gretel's guidance, Take it step by step and start experimenting.

——Take the feces of healthy rabbits and sick rabbits, place them on the aspic respectively, and Elder Erwin throws them on with a growth spell. After the magic was done, bacterial culture was performed, and as expected, those short, rod-like gadgets were found in the feces of the sick rabbit.

"Healthy rabbits don't have gadgets like this, right?"

Grete smiled leisurely. Eight petri dishes were lined up, and no rod-shaped gadgets were found in the feces of the eight healthy rabbits. Looking at his dazzling smile, High Priest Horner endured it again and again before throwing rabbit shit in his face:

"No! So what?"

"Not very good." Grete shrugged and continued to the next step. Pick up some bacteria from the gray-white round colonies in the petri dish of the sick rabbit, and smear it on a newly delivered clean petri dish that has never been used before -

"Teacher, I have to trouble you again."

Throw the second growth spell up. The translucent aspic was quickly covered with round bacterial colonies. Cultivate the bacterial flora, verify the purity of the bacterial colony, then mix the bacteria with cold boiled water and feed them to healthy rabbits, and wait patiently for a few hours until they start to get sick——

As expected, the same rod-shaped microorganisms were cultured in the feces of the newly sick rabbits.

After everyone took turns to verify it, Gretel faced High Priest Horner, smiled and spread his hands.

"It can be found in sick rabbits; it can't be found in healthy rabbits. Things obtained from sick rabbits can survive, reproduce, and multiply, and are injected into healthy rabbits, causing exactly the same disease. From the second batch of sick rabbits, The same thing was isolated again - do you need any other evidence?"

The famous Koch's Law can be refuted on the spot, unless the goddess of spring water descends to earth immediately!

"Impossible!" The great priest's face turned pale. He suddenly turned around and ran to the main hall, knelt down in front of the statue, and hugged the goddess's skirt with both hands:

"It's really the holy spring... It's really the holy spring that caused the plague... Goddess! Are you going to punish us?!"

Thanks to @chu9999999 for the reward of 300 starting coins

What day is today... Mr. Yuan is gone... Mr. Wu Mengchao is also gone... They are all pillars of the country...

Feeling uncomfortable, huddled up in a ball...