The number of cases has reached 655,000! The most serious dengue fever outbreak in a decade has occurred in many places

June 8,

The General Administration of Customs issued an important reminder.

Be alert to the spread of dengue fever

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Dengue fever outbreaks reported in many countries

According to the World Health Organization (WHO), an outbreak of dengue fever has occurred in Sao Tome and Principe, with a total of 103 cases of dengue fever reported from April 15 to May 17. This is the first time a dengue fever outbreak has been reported in the country.

According to data from the Brazilian Ministry of Health, Brazil has experienced the most serious dengue fever outbreak in a decade. In the first four months of this year, a total of 655,000 dengue fever cases were reported, which is 1.2 times the total number of dengue fever cases in the country last year (544,000 cases).

In addition, Southeast Asian countries such as the Philippines, Singapore, Vietnam, Myanmar, and Malaysia have reported dengue fever outbreaks to varying degrees.

Disease characteristics

Dengue fever is an acute mosquito-borne infectious disease caused by the dengue virus, which is mainly transmitted through the bites of Aedes aegypti or Aedes albopictus. The incubation period is 3 to 15 days, mostly 5 to 8 days. The clinical manifestations are acute onset, ranging from mild fever to high fever, accompanied by severe headache, muscle and joint pain, and rash, flushing of the face, neck, and chest. In severe cases, death may occur due to shock or damage to other important organs.

Customs Reminder

People entering and leaving the country should increase their awareness of risks, pay attention to preventing mosquito bites, and take good personal protection; if they experience symptoms such as fever, headache, muscle and joint pain, and rash during entry and exit, they should promptly inform the crew of the transportation vehicle; when declaring health, they should truthfully report to the customs so that customs health quarantine personnel can conduct quarantine inspections and help passengers receive diagnosis and treatment as soon as possible.

Dengue virus enters the human body through the bite of Aedes mosquitoes.

Only female mosquitoes suck blood.

Twelve species of Aedes mosquitoes are known to transmit the disease.

But the most important ones are Aedes aegypti and Aedes albopictus

(commonly known as "aedes mosquito").

Although not all mosquitoes can spread dengue fever~

But summer is here,

That puzzling question comes again.

Why do mosquitoes always bite me???

Are the "urban legends" about mosquitoes true?

"O-type blood is sweet and most likely to attract mosquitoes"

"Type A blood smells bad, mosquitoes don't like it"

When pinching mosquito bites, make sure to make a cross

To "seal"

Are these claims true?

In fact, most of them have no scientific basis↓

The "mosquito blood type theory" has no scientific basis

What influences mosquitoes to bite is not blood type but smell. Compared with identifying blood type, mosquitoes prefer cool guys wearing black clothes who sweat easily and love to wear perfume.

Why do mosquito bites itch?

This is because when mosquitoes bite people, they inject their "saliva" into our bodies.

When mosquito saliva containing anticoagulant and anesthetic ingredients is injected into the human body, the body will release histamine, causing mosquito bites to form on the skin surface and producing an itchy sensation.

It is true that the more you scratch a mosquito bite, the more it itches.

Scratching mosquito bites will stimulate the continuous secretion of histamine, making people more and more itchy.

Applying saliva to mosquito bites does not relieve the itching

99% of human saliva is water. Applying saliva to the saliva is almost the same as applying water. It has no real effect on relieving itching. (Tell grandma quickly)

Is it useful to pinch a mosquito bite in the shape of a cross?

Yes, but not completely. Pinching the cross-bun relies on the pain to suppress the itching, which is temporarily effective. However, if the skin is broken and infected, it is not worth it.

Who is the walking meal in the mosquito's eyes?

People who exhale a higher proportion of carbon dioxide are more likely to be spotted by mosquitoes, who can sense such people from 50 meters away;

People with a higher basal metabolic rate and more active metabolism sweat more and are more attractive to mosquitoes;

Drinking a lot of alcohol, especially beer, will cause your sweat to contain alcohol and acidic substances such as acetic acid formed by metabolism, which will also attract mosquitoes.

Pregnant women have a higher metabolic rate and exhale 20% more carbon dioxide than normal people, so they are more attractive to mosquitoes.

People who wear dark-colored clothes, such as black, purple, and bright red, are more likely to attract mosquitoes.

What is the most effective way to prevent mosquitoes?

Source: Science Popularization China WeChat Official Account