Measles, a Pregnant Traveller, and a Plane Ticket
A 32-year-old woman presents to a general practice clinic with three days of fever, cough, coryza and conjunctivitis, followed by a maculopapular rash starting on her face. She returned from the Philippines 10 days ago. She is 22 weeks pregnant and has a 4-year-old son at home who has not been vaccinated against measles because of parental concerns. You suspect measles. She feels 'not that unwell', refuses hospital admission and says she must fly to Manila tomorrow for her sister's wedding. She asks you not to tell anyone because 'it will ruin everything'. The clinic has no negative-pressure room; the waiting area had 15 patients this morning.
1. What are your statutory and public health obligations?
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Measles is a statutory notifiable disease in Hong Kong under the Prevention and Control of Disease Ordinance (Cap 599). You must notify the Centre for Health Protection promptly, even if the diagnosis is only suspected and even if the patient objects; notification is a legal duty and is not the same as disclosing her identity to the public. Arrange urgent laboratory confirmation, including measles IgM and PCR, and discuss the case with the local public health unit. In the clinic, isolate her immediately in a single room with the door closed, use airborne precautions if available, and wear an N95 respirator. Record the names and contact details of staff and patients who were in the waiting area, so that contact tracing can be carried out. Advise her not to use public transport. Her refusal of admission does not remove your duty to notify and to protect other people.
2. How would you manage her refusal of admission and her plan to fly?
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Explain clearly why admission and isolation are recommended: measles is highly infectious, and she is at increased risk of pneumonitis and pregnancy complications, including fetal loss. She also poses a serious risk to her unvaccinated son, to pregnant women, and to immunocompromised people. Listen to her reasons and try to solve practical problems, such as childcare or the wedding, but do not collude with unsafe travel. Tell her that flying while infectious is a public health risk and that the airline and public health authorities may need to be informed. If she insists on leaving, document the discussion, give written advice about isolation and symptoms, and inform the public health unit immediately so that follow-up and contact tracing can be arranged. A medical officer may have powers to restrict movement or require isolation under public health legislation; seek advice from the Centre for Health Protection. Do not physically restrain her; your duty is to advise, document, and escalate.
3. What would you tell her about her son and about the clinic waiting room?
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Her son is a susceptible close contact. He should receive post-exposure prophylaxis with MMR vaccine within 72 hours of exposure, or immunoglobulin within six days if MMR is contraindicated; because he is 4 years old and not immunised, MMR is the usual option, and he should be excluded from school or nursery during the incubation period. She herself is pregnant and cannot receive MMR; if she is not immune, immunoglobulin may be considered after specialist advice, but it is not a substitute for avoiding further exposure. For the clinic, the public health unit will assess the 15 patients and staff who shared the waiting area, checking immunity and offering post-exposure prophylaxis where appropriate. Staff should have documented measles immunity. Explain that you cannot keep the waiting-room exposure confidential, but that you will share only the information needed for contact tracing.