Qian Meizhen Comprehensive Compilation is located at Harvard-West Lake School in the South Valley of St. Foster, Los Angeles. Harvard-West Lake School, which provides education for students from grades 7 to 12, is one of the best rated private middle schools in the Los Angeles ar

Qian Meizhen Comprehensive compilation

is located in Harvard- Westlake School in the Santo Valley of Santa Foster South, Los Angeles. Recently, nearly 50 students have been diagnosed with whooping cough .

Harvard-West Lake School, which provides education for students from grades 7 to 12, is one of the best rated private middle schools in the Los Angeles area. Over the years, it has been selected for the top ten private schools in the United States for review by different units many times.

This time, a whooping cough outbreak broke out in Harvard-West Lake School, which has attracted the attention of the Luo County health authorities due to the special circumstances. Because school officials said all students who are sick have been vaccinated.

According to Luo County health officials, 90 people suffering from illness have previously received vaccination in those cough cases found in Luo County this year.

Dr. James Cherry, an expert in pediatric infectious diseases in Los Angeles, said that it turns out that after four years of receiving the vaccine, the child has lost the effect of vaccine protection in his body by the time he reaches the seventh grade. This will cause higher-grade children to suffer from illness, such as the epidemic situation of Harvard-West Lake School students.

Dr. Chery believes that the large-scale epidemic at Harvard-West Lake School is not a special case.

This epidemic is another real case, to prove that experts have been paying attention to, that is, the medical community has changed from 1997 to use a new type of pertussis vaccine, but the immunity of this new vaccine will quickly fade.

The outbreak of the pertussis epidemic has caused a problem, which is how to prevent and treat the epidemic when the vaccine's protective effect is rapidly declining. The students currently in high school are the first generation of children to receive new vaccine injections, and these children will become the first ethnic groups to face this situation.

In the United States, the whooping cough epidemic is in sharp contrast with the measles epidemic. Whooping cough is due to the decline in the effectiveness of the new vaccine, but measles is due to a certain proportion of parents who refuse to let their children get vaccinated. In general, vaccination is a defense against most infectious diseases.

Law County health authorities said last month that three teenagers in the county had an outbreak of whooping cough.

Harvard-West Lake School has 46 students diagnosed with whooping cough, and the school has 1,600 students. The school pointed out that 18 of the students in the school were not vaccinated, but all the children who were not vaccinated were not sick.

There are also 10 school children suffering from whooping cough at St. Anastasia Catholic School in Westchester. The school responded that all students with illness had been vaccinated with whooping cough.

California law stipulates that children must receive a whooping cough vaccination before going to school unless the child cannot get vaccinated for individual medical reasons.

California stipulates that when a young child is over 6 years old, he must receive a five-in-one mixed vaccination. The five-in-one vaccine can simultaneously prevent five infectious diseases such as diphtheria, tetanus, whooping cough, polio and type b Haemophilus . Later, in the 7th grade, he received a reinforcing vaccine injection again.

But most parents let their children receive vaccination during their infancy, because babies are most likely to die from diseases such as whooping cough. But studies show that the immune efficacy in the body will drop rapidly after vaccination. Kaiser Permanente study pointed out that after children receive the last dose of vaccine at the age of 6, the protective efficacy of the vaccine will drop by 42% per year on average.

Experts believe that this is related to the use of new vaccines in children. The old three-in-one vaccine before 1997 used whole-cell pertussis ingredients, but the new five-in-one vaccine used non-cellular pertussis ingredients. Because in the past, whole-cellular components may cause children to have adverse reactions such as redness, swelling, pain or fever at the inoculation site after inoculation.

Kaiser Medical's research also pointed out that even if children receive a reinforcing vaccine in the 7th grade, only 80% of the people will get about one year of protective effect. After this, most people lose the immunity effect of the vaccine.