What is yellow fever
Release time : 04/24/2025 09:30:02
On March 13th, the National Health and Family Planning Commission released a significant piece of news: China has confirmed its first imported case of yellow fever.
The patient's body temperature reached up to 39.3°C, accompanied by symptoms such as chills. After testing, the patient's specimen was initially positive for nucleic acid screening, and is currently receiving active treatment.
So, what exactly is Yellow Fever? What are its specific symptoms? Can it be transmitted? Can it be cured? Perhaps the worried mothers and netizens who know about this might have some concerns. Below, the Net Weibo encyclopedia will specifically discuss Yellow Fever for you.
Yellow fever is a disease caused by the yellow fever virus transmitted by mosquitoes. It is primarily endemic in tropical regions such as South America, Central America, and Africa.
China has also been confirmed to have imported cases of yellow fever. We can't afford to be complacent.
So, what is Yellow Fever? Let's dive deeper into it.
Yellow fever has two types, namely the urban type and the jungle type.
Among them, the susceptible population of Yellow Fever in urban areas is mostly children, while most adults acquire immunity through infection.
The majority of cases of jungle fever are among adult males.
The pathogenesis of yellow fever is that the yellow fever virus invades the human body and spreads to lymph nodes, then passes through the blood to form viremia, and invades the liver, spleen, kidney, lymph nodes, bone marrow, striated muscles and other human parts, and even causes serious lesions.
Even if a disease is as fierce as a flood or wild beast, we should not lose our confidence in fighting it. Take yellow fever for example; once you are cured from it, you can obtain lasting immunity and therefore need not be overly concerned.
The symptoms of dengue fever are particularly severe during the late spring, when it is at its peak. The threat posed by new cases in cities is particularly significant, especially among children, making it even more important for mothers to understand the symptoms of dengue fever to prevent any potential outbreaks.
What are the symptoms of yellow fever? Symptoms appear 3-6 days after infection: fever, muscle pain, headache, chills, loss of appetite, nausea and vomiting.
Onset within 3-4 days: Symptoms significantly improve or even disappear, but there are still 15% of cases that experience worsening symptoms one day after the initial relief, manifesting as jaundice, abdominal pain, and bleeding.
Recovery phase: During the course of 7-8 days, the patient's temperature will typically fall to normal, and symptoms will gradually disappear. However, within 1-2 weeks, the patient may still feel fatigued all over, requiring close monitoring of their physical condition.
Moreover, if a patient enters the poisoning stage, it becomes quite challenging; approximately 50% of patients will die within 10-14 days.
Yellow fever is contagious. Talking about contagious diseases, people are generally afraid of them. Yellow fever, on the other hand, is transmitted by mosquitoes, which means that if you are bitten by a mosquito carrying the yellow fever virus, the chance of contracting it is very high.
Yes, internationally it is classified as a quarantine-related disease, and China has also designated it as a class A infectious disease. It seems that this disease really cannot be taken lightly.
It is worth mentioning that, currently, the first case of yellow fever in China belongs to imported cases and does not have a large-scale outbreak trend. As long as we take preventive measures, do not bite by mosquitoes or contact patients with yellow fever, the chance of infection is relatively low.
In China, urban typhus may become the main type of typhus. Typhus patients are the main sources of infection. If symptoms appear, one should seek medical attention and inform the doctor of their travel history to prevent further spread of the disease.
How long does Yellow Fever take to recover? We know that Yellow Fever symptoms vary from mild fever, headache, and slight proteinuria to severe complications such as jaundice and bleeding. It also has three stages: the infectious period, the toxic period, and the recovery period. So, how long does it take for a person with different degrees of Yellow Fever to fully recover? Let's have a look.
Generally speaking, mild malaria recovers after a few days, but severe patients may take longer to recover. The initial phase of infection usually lasts for about 3 days, starting from the fourth day, and then enters the toxic stage, which can last for 3-4 days. If the condition worsens during this period, there is a risk of life-threatening complications.
After this phase, the patient's temperature began to drop and return to normal, and symptoms of dengue began to gradually disappear. After 1-2 weeks or even months of fatigue period, if there are no abnormal conditions, recovery can be expected, and there is generally no sequelae.
How to prevent Yellow Fever? Yellow fever is a highly contagious disease. If there are children in the family, mothers should especially strengthen prevention and protect their children from infection.
So, what are the effective prevention methods? Let's learn together!
For individuals, the correct preventive measures are as follows: 1. Vaccination. Inoculating children with yellow fever vaccines can produce immunity within 7-9 months after vaccination and the effects can last for up to ten years.
2. Wear long sleeves, as they are more prone to mosquito bites in the spring and summer months. It is advisable for babies to wear loose and breathable long sleeves to avoid being bitten by mosquitoes.
3. To effectively control mosquitoes, if you have a lot of them in your house, you can install window screens and use candles to avoid being bitten by the insects, thereby preventing the transmission of diseases.
4. Avoid contact with patients; individuals infected with yellow fever should be avoided, especially children who are particularly vulnerable to infection.
5. Keep the environment clean as much as possible, ensure that pots are not waterlogged and leftover food is cleaned up in a timely manner to prevent mosquito breeding.
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* The medical part covered in this article is for reading and reference only.
In cases of discomfort, it is recommended to seek medical attention immediately. The diagnosis and treatment should be based on the examination conducted in person by a medical professional.