Vaccine Allergy Safety Track (VAS-Track) to COVID-19

Experiences from other countries have shown that severe allergic reactions (anaphylaxis) to the novel COVID-19 vaccinations are occurring at an unprecedented rate. Albeit rare, these anaphylactic reactions often occur at the first dose after COVID-19 vaccinations and can be life-threatening.  Therefore, COVID-19 vaccines are currently restricted from at-risk patients with a history of severe allergic reactions.

Utilising state-of-the-art clinical and laboratory allergy testing, HKU Department of Medicine will pilot the territory's first COVID-19 vaccine allergy protocol to study how to best facilitate at-risk patients to safely receive the COVID-19 vaccinations.




Participants Recruitment | 研究對象招募

You are eligible to join the study if you consent to allergy testing (skin and blood tests) AND meet the any of the following requirements:

  • History of reactions to multiple classes of drugs or anaphylaxis
  • History of anaphylaxis or at risk of anaphylaxis
  • Severe reactions after other allergens, e.g. drugs/foods/insects (especially injectables)
  • Severe reactions after other vaccines or prior COVID-19 vaccine


  • 曾對多種藥物類別過敏或對藥物有嚴重過敏反應的病歷
  • 有嚴重過敏史或風險
  • 曾對其他致敏原有嚴重反應,例如藥物/食品/昆蟲(尤其是注射劑)
  • 以往曾對其他疫苗或之前接種2019冠狀病毒病疫苗有嚴重反應
Enquiries | 聯絡研究團隊

For any enquiries, please contact Mr Li:


+852 2255 2369