Counterfeit(假的) medicines are a widespread problem in developing countries. Like other counterfeits, they look like real products. But counterfeit drugs may contain too little or none of the active ingredients of the real thing.

    People do not get the medicine they need. And in some cases, counterfeits cause death. Twenty children in Bangladesh died last year after being given acetaminophen(对乙酰氨基酚).The medications contained ingredients that looked, smelled and tasted like the real thing. The medicine was produced by a local drug company that used a dangerous substitute to save money.

The problem of counterfeit medicines is especially serious in Africa, Asia and Latin America. The WHO estimates that up to thirty percent of medicines on sale in many of those countries are counterfeit. The problem is less widespread among industrialized countries. The WHO says counterfeits make up less than one percent of the illegal drug market in countries like the United States, Canada, Japan and New Zealand.

    But the agency also says as much as fifty percent of the medicine sold on the Internet is counterfeit.

    Much is being done to fight counterfeit drugs. Several companies are developing ways to make counterfeits easier to identify. And there are existing methods, like a machine that can quickly identify chemicals in pills to confirm if the pills are real. Other ideas include things like special tracking codes for drug packages. People could send a text message with the code and get a message back, which proves that what they bought is listed in a database. Some drug makers and other companies put three-dimensional images called holograms(全息图)on their products as a security device.

    An article describing the attitude of post-1990s generations toward life has recently gone viral on Chinese social media, which resonates with(引起共鸣) millions of youngsters for reflecting their casualness and calmness under gradually increasing social pressure.

    The article was first published on WeChat with the title of “The first group of post-90s generation who have become monks”. By using the phrase “Buddha-like youngsters”(佛系青年), it claimed that some of the post-90s generations, who were born between 1990 and 1992, have “seen through the emptiness of life” and kept a casual and calm attitude toward career and life.

    “It's fine to have something or not and there is no need to pursue or win anything," said the article, while defining "Buddha-like" people and clarifying that the phrase has nothing to do with the religion of Buddhism. An easy example is that Buddha-like youngsters do not care about taking which way to return home or choosing what to eat for lunch, according to the article.

    The phrase has touched the nerves of the Chinese youngsters who are facing the fast-paced life, cut-throat world of career and great mental pressure in China, read a commentary by People's Daily on Wednesday. The phrase was well received by Chinese netizens; the original WeChat post has been viewed by more than 1 million times and then read more than 60 million times on SinaWeibo by Wednesday.

    “The phrase properly describes the mentalities and lifestyle of (some of) the post-90s generations in China, who have become less ambitious and more casual toward life due to the great pressure and fierce competition in today's China”, one SinaWeibo user commented.

    Are you a Buddha-like youngster？

    This year's flu season is pretty scary. To try to minimize the effects, public officials are still urging anyone who hasn't yet gotten their flu shot to get one as soon as possible. However, even if every single person got a shot in the arm, the vaccine(疫 苗)—with its excellent 36 percent effectiveness—would not prevent everyone from getting infected with the annoying virus. Knowledge is power, so here's what goes on in your body when you come down with the flu.

    The influenza virus primarily attacks your nose, throat, and the tubes that lead to your lungs. But the flu is so much more than that. Your muscles ache, your head hurts, and your appetite goes down, among other things. To our surprise, almost all of these symptoms have less to do with the virus itself than with your immune(免疫的)response to them. Unfortunately, the very defense you have in place to get rid of the flu is the reason you feel so painful when you recover.

    The virus usually enters through your mouth, typically by way of your hands. But it takes a few days for symptoms to set in. While this process might cause some harm to your nose and throat, it's nothing major, and nothing like the symptoms that typically accompany a bad or even mild case of the flu.

    The real fun starts when your immune system begins to fight. Your immune system comes in two parts: the innate system and the adaptive. The innate immune system is essentially an all-purpose tool. As soon as your body senses the presence of any injury or invader, the innate immune system launches into action by producing tiny proteins called cytokines and chemokines. The cytokines reproduce almost immediately and start to attack the virus. This increase in immune cells creates a serious inflammation(炎症) throughout the body. But the worst is still to come.

    Meanwhile, the chemokines work with the adaptive immune system to help create T cells. These cells are a special type of white blood cell that works in a much more specific way: They find the influenza virus, identify what's special about it, and create something unique on their surface that finds and destroys similar invaders.

    Oct.15th was International White Cane Safety Day. You may have never heard of it, but it was a day to remember for Peng Baier, 17, of Nanjing Foreign Language School. After school that day, he visited his local Disabled Persons' Federation (残疾人联合会). He wanted to know about the sales and feedback (反馈) of his newly published book, How to Help a Disabled Person.

    Since he lives with his disabled grandparents, he understands that life can be hard for this group of people. Peng decided to write the book because he wanted to create a better life for disabled people in China.

    “Crossing the street is a big problem for them,” Peng said. “Speeding cars, people walking in a hurry, bikes on the sidewalk for the blind - accidents can happen everywhere. That's why we hardly ever see disabled people on the street, even though there are millions of disabled people in China.”

    Peng's book with pictures is easy to understand. It is a guide to the right and wrong ways to treat disabled people. The left-hand pages show the reader the right way; the right-hand pages point out mistakes that are commonly made.

    The teenager had 2,000 copies of his book printed. With the help of the Disabled Persons' Federation, he gave them to the disabled community.

    “The book is bilingual, so foreigners can also use it,” said Peng.

    Peng put great effort into the book. For example, he interviewed many disabled people to get first hand materials. He also studied textbooks from different schools for the disabled. Peng finally completed his handbook, but he still had the problem of getting it printed.

    How does a high school student raise money needed for that?

    With a smile, Peng said how he went about it. “I visited three local companies, dressed up in a suit and tie. I was lucky. The companies were warm-hearted and willing to give me a hand.”

    Elephants are able to know the difference between a man and a woman, and can tell an adult (成年人) from a child—all from the sound of a human voice. This is according to a study in which researchers played voice recordings to wild African elephants.

    The animals showed more fear when they heard the voices of adult Masai men. Usually Masai people hunt elephants, and this suggests that animals have grown to listen for and avoid them.

    Prof. Karen McComb and Dr Graeme Shannon from the University of Sussex led the study. They explained that in former research they had used similar experiments to show that elephants could tell—from the sound of a lion—whether the animal was a female (雌性) or a more dangerous male (雄性).

    Prof  McComb wanted to find out if the animals used their very sharp sense of hearing to recognize danger from humans.

    The scientists recorded Masai men, women and children saying, in their own language, "Look, look over there, a group of elephants are coming." They also recorded Kamba men saying this phrase.

    Masai people often come across elephants, which can result in violent (暴力的) hunting. Kamba people, however, mainly feed on agriculture, which does not generally bring them into violent touch with the animals.

    When the team played recordings of these different voices through a hidden speaker, they found that elephant family groups showed more fear in response to the voice of a Masai man, than to a Kamba man's voice. And the adult male Masai voices caused far more violent response than the voices of women or boys.

    It started during a yoga class. She felt a strange pull on her neck, a feeling completely foreign to her. Her friend suggested she rush to the emergency room. It turned out that she was having a heart attack.

    She didn't share similar symptoms with someone who was likely to have a heart attack. She exercised, watched her plate and did not smoke. But on reviewing her medical history, I found that her cholesterol (胆固醇) level was sky-high. She had been prescribed a cholesterol-lowering statin (他汀) medication, but she never picked up the prescription because of the scary things she had read about statins on the Internet. She was the victim of fake medical news.

    While misinformation has been the object of great attention in politics, medical misinformation might lead to an increase in deaths. As is true with fake news in general, medical lies tend to spread further than truths on the Internet—and they have very real bad consequences.

    False medical information can also lead to patients experiencing greater side effects through the "nocebo effect (反安慰剂效应) ". Sometimes patients benefit from an intervention (干预) simply because they believe they will—that's the placebo effect (安慰剂效应). The nocebo effect is the opposite. Patients can experience harmful effects because they anticipate them. This is very true of statins. In blinded trials, patients who get statins are no more likely to report feeling muscle aches than patients who get a placebo. Yet, in clinical practice, according to one study, almost a fifth of patients taking statins report side effects, leading many to discontinue the drugs.

    What else is on the fake news hit list? As always, vaccines (疫苗) . False concerns that the vaccine may cause side effects have greatly reduced coverage rates.

    Cancer is another big target for pushers of medical misinformation—many of whom refuse alternative therapies. "Though most people think cancer tumors are bad, they're actually the way your body attempts to contain the harmful cells," one fake news story reads. It warns that prescription medications lead to the uncontrolled cell mutations (变异) .

    Silicon Valley needs to face this problem. I am not a free-speech lawyer, but when human health is at risk, perhaps search engines, social media platforms and websites should be held responsible for promoting or hosting fake information. Meanwhile, journalists should do a better job of spreading accurate information.