One of the most important and effective ways to prevent and control infectious diseases is to prepare highly effective preventive vaccines, so that susceptible people can be protected by vaccines after vaccination and avoid contracting diseases. However, in the study and prevention of influenza, the most troublesome thing is the difficulty of predicting what the next influenza virus will be. The reason is that there are too many subtypes of influenza viruses, and influenza viruses are constantly mutating, and even slight mutations in the same subtype of virus may cause the previous vaccine to fail, so susceptible people need to be vaccinated every year, and the vaccine may be different each time.

The development of a new vaccine is not a simple matter, even if it is handed over to national-level laboratories and personnel, it will take two to four months at the shortest, and during this time, no one can predict how many people will be infected without a vaccine. The most frightening thing is that if the influenza virus mutates again during this period, then the previous efforts will be in vain and will have to be repeated, which is quite a terrible thing.

In particular, when negative-stranded RNA viruses such as H5N1 replicate themselves, they need to first transcribe their single-stranded RNA into complementary mRNA and use it as a template for future replication. However, the RNA transcriptase used in this process is quite unreliable, and the resulting RNA mutation rate is staggering. Although this means that avian influenza viruses are unable to stably transmit genetic information to their offspring, through this "mistake", the virus has a chance to evade the effects of vaccines or drug hunts by constantly mutating.

Lo Zhiyuan is well aware of this, and he learned from the Centre for Health Protection that there are so many cases of infection, and he knows that the contagiousness of this H5N1 variant is very alarming.

"Immediately do a pathogenicity test and put together a copy of the test report and submit it to the Center for Health Protection."

After the order, Lu Zhiyuan hung up the phone, not knowing how pathogenic the H5N1 variant is, which is also a point that needs urgent attention at present.

After hanging up the phone, Lu Zhiyuan drank the water in the cup in one go, came to the window and opened the window, looking at the night outside and sighing.

Back to yesterday morning - after Cathay Pacific flight CX873 almost crashed due to high-altitude turbulence, passengers on the passenger plane were arranged by airport staff to rest in the hotel.

It's a four-star hotel, and although it's not as luxurious as a five-star hotel, after moving in, Ellie and Jason found that the environment here is actually pretty good.

"Well, when are we going to get out of here? It won't ruin our journey, will it? ”

Jason put down his suitcase, still a little afraid of what happened to the airliner before.

"They said they would compensate us for the cost of the ticket this time, but I don't know when, maybe after the cause of the accident is investigated?"

Ellie thought for a moment: "If there is no result tomorrow, let's go, the travel plan has been arranged, and if the time is delayed, we will not be able to spend Christmas in Paris." ”

"Mom, I'm hungry." Little Karin saw that her parents only cared about talking to herself, and she didn't pay attention to herself, and shouted with Ellie's **.

"Okay, baby, let's go down and have some breakfast."

After putting the luggage away, the family of three took the elevator to the second floor of the hotel, where there is a large cafeteria, and you can choose what you need.

In the restaurant, a large number of passengers on this flight had already gathered, and less than one-fifth of them were Caucasia like Ellie, and most of the rest were Chinese.

The discussion and murmur did not stop from the time Ellie sat down with the dinner plate, Ellie could not understand Chinese, but she could also roughly understand that these passengers were nothing more than talking about this dangerous situation, which could be seen from their respective expressions of apprehension.

Ellie didn't want to talk about the things that had passed, she didn't want to let this incident leave a shadow on Karin's heart, she just talked to her husband about the attractions in Hong Kong and let Karin choose where to go.

As a child, of course, she was very interested in amusement parks, and Karin did not hesitate to choose Hong Kong Disneyland as an amusement park.

Ellie and Jason, who doted on their daughter, naturally did not object, and after breakfast, they called a taxi, and the three of them went to Disney Amusement Park together.

Hong Kong Disneyland is the fifth Disneyland in the world, attracting countless visitors not only in Hong Kong, but also in the world, especially for children.

Entering Disneyland, Ellie and the three of them first strolled down the streets of American Town, surrounded by countless tourists, holding cameras to take pictures of various gas lamps and horse-drawn carriages on the street. Jason also took the camera hanging on his chest, asked Ellie's mother and daughter to stand up, and began to take pictures of them.

"Okay, that's the position, baby, laugh one."

"Well, that's good."

Jason put down his camera satisfied, he had just taken a very nice photo of his wife and daughter smiling.

"How's the shot?"

"It's working great." Jason said.

"Daddy, go there." Karin pulled Jason's right hand and pointed ahead.

"Okay, baby."

Accompanied by Karin, the three of them walked around the amusement park from beginning to end, went to the Dream Garden, took photos at the Sleeping Princess Castle, sat on the ** sugar bottle that Winnie the Pooh held at night, and shuttled and galloped on the roller coaster, everything made Karin happy, and her face showed the happiest smile.

After playing for a few hours, and it was almost noon, the three of them came to the theme restaurant to sit down for dinner, where there were many parents with their children to eat, and it was not surprising that Ellie and they sat here.

"Ahem......"

"What's wrong? Baby, are you uncomfortable? ”

Eating ice cream, Karin suddenly coughs, startling Ellie.

"Mom, my throat is a little uncomfortable." Karin frowned and said softly.

"My throat is uncomfortable, how can it be, is it a little cold?"

Ellie worried, "Do you want us to go back first?" ”

"No, Mom, I'm fine." As soon as she heard Ellie say that she was going back, Karin was a little unhappy.

"I don't think it's okay, just a little cough."

Touching the little girl's head, Jason laughed.

Hearing that both father and daughter were opposed to going back, Ellie had no choice but to agree.

After lunch at the theme restaurant, the three of them went to play again, Disneyland's huge playground and a variety of rides are enough to ensure that it is not just a few hours to play, there are too many rides for people to enjoy and do not know the time.

Three hours later, "cough cough cough ......"

Started coughing again.

Ellie looked down at Karin, watching the little girl cover her mouth and cough incessantly, she finally felt that something was wrong.

"No, baby must have a cold, let's go." Ellie worried.

"No, Mom...... I, I'm fine, ahem......"

The sentence came out intermittently, and finally he couldn't help coughing, and even the careless Jason said resolutely: "Go, that's all for today." ”

"Ahem......"

There was no need for him to say anything more this time, and Karin coughed and clutched her neck, seemingly uncomfortable, and the horrible and painful look frightened Ellie and Jason.

"Baby, what's wrong with you?"

Holding Karin, Ellie was startled.

"Baby, breathe slowly, come, follow me, breathe slowly......"

Jason squatted and hurriedly demonstrated for Karin.

Unfortunately, his demonstration was not very effective, and Karin's small azure eyes looked at him a few times, trying to calm down her breathing, but the result of this was to cause a more severe cough.

"Oh my God, Jason, hurry up and call the police."

Ellie panicked, hugging Karin's head with a hint of crying in her voice.

"Let go of her, you idiot, give her a little more air to breathe, you're going to suffocate our daughter like this."

Pulling Ellie away, Jason took out his phone and tried to make an emergency call, "God, who told me what the ambulance number is here?" ”

The moment he picked up the phone and wanted to make a call, Jason remembered that this was not the United States, it was a strange place that he was not familiar with, how to know which emergency number to call.

"Oh my God, Jason, she's passed out."

Ellie said in horror to Jason.

"What?"

Jason turned around, and sure enough, he saw his baby daughter, lying in his wife's arms, fainting.

"Damn ......" (To be continued.) )