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Measles Travellers 麻疹萬里遊

(updated on 2019/06/05)

©2019 SpatioEpi.com
Data source: Data for the map were obtained from the Centre for Health Protection, Department of Health, Hong Kong.
Map created by CUHK SpatioEpi Group


According to the Centre for Health Protection of Hong Kong Government's Department of Health, 66 measles cases had been reported between January and April 2019. Among the reported cases, 13 were classified as imported, while 29 were associated with an outbreak among workers at the Hong Kong International Airport (HKIA).

The maps show the distribution of travel locations of reported cases during their incubation period. Before HKIA outbreak (upper map), most of the reported cases had visited places where there were measles outbreaks, such as Japan and the Philippines. During HKIA outbreak, a majority of the associated cases gave a history of travel to Japan or Mainland China (lower map). A large proportion of the imported cases during this period had traveled to the Philippines. Most of the non-import and non-HKIA cases classified as "others" did not have travel history.

Measles is a highly contagious disease. Transmission of measles virus could occur when a non-immune person is exposed to an infected person, which may happen when an outbreak occurs, either during travel or in Hong Kong. Vaccination is currently the best means of protection from infection.

Data for the map were obtained from the Centre for Health Protection, Department of Health, Hong Kong.

香港政府衛生署衛生防護中心稱, 2019年1月至4月期間已接獲66宗麻疹感染病例報告。當中13個病例被列為輸入個案,29宗被列為與香港國際機場工作人員麻疹爆發關連個案。

地圖顯示了在潛伏期期間不同個案分類的外遊地點分佈和數目。 在香港國際機場工作人員麻疹爆發前的時段 (上圖),個案主要是輸入個案並曾到過有麻疹爆發的地方,如日本和菲律賓。在香港國際機場工作人員麻疹爆發期間,大多數與該爆發有關連的病例都有日本或中國內地的外遊記錄(下圖)。期間大部分輸入個案都曾經到過菲律賓旅遊。而被分類為其他個案(非輸入、非機場關連個案)則大都沒有外遊記錄。



Related Article

Measles 麻疹

What is measles? 什麼是麻疹?
Measles is a highly infectious disease caused by Measles virus. Incubation period usually ranges from 7 to 18 days.
Affected persons present initially with cold-like symptoms, such as runny nose, sneezing and cough. Other early symptoms include fever, sore and red eyes and small greyish-white spots in the mouths. These are followed 3 to 7 days later by red-brown blotchy rash, which usually spreads from the head or upper neck to the rest of the body.
The infection usually clears in around 7 to 10 days, and lifelong immunity will be developed. Serious complications like pneumonia and encephalitis do occur, and could cause death especially in children under the age of 5.
患者初時會有與傷風相似的病徵,如流鼻水、打噴嚏及咳嗽,其他感染初發病徵則有發燒、眼紅眼痛及口腔內出現白點。3至7 天後皮膚會出現污斑紅疹,通常由頭部或上頸擴散到全身。

How does it spread? 如何傳播?
Measles virus can be spread by droplets that come out of the nose and mouth from an infected person during coughing or sneezing. The virus can also be transmitted by direct contact with nasal or throat secretions of infected persons, or articles soiled with nasal or throat secretions. An infected person can be infectious from the time of symptoms development until about four days after appearance of the rash.

Vaccine? Prevention? 如何預防?
There is no specific treatment for measles, but vaccination is effective to prevent the disease. Measles, mumps and rubella (MMR) vaccine can be administered by injection for immunisation against measles. Children should follow the recommended schedule of local childhood immunisation programme for vaccination.

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