• Salim Parker, Robert Steffen, Harunor Rashid, Miguel M Cabada, Ziad A Memish, Philippe Gautret, Cheikh Sokhna, Avinash Sharma, David R Shlim, Eyal Leshem, Dominic E Dwyer, Faris Lami, Santanu Chatterjee, Shuja Shafi, Alimuddin Zumla, and Ozayr Mahomed.
• Division of Infectious Diseases and HIV Medicine, Department of Medicine, University of Cape Town, Cape Town, South Africa.
• J Travel Med. 2024 Aug 31.

BackgroundPilgrimages and travel to religious Mass Gatherings (MGs) are part of all major religions. This narrative review aims to describe some characteristics, including health risks, of the more well known and frequently undertaken ones.MethodsA literature search was conducted using keywords related to the characteristics (frequency of occurrence, duration, calendar period, reasons behind their undertaking and the common health risks) of Christian, Muslim, Hindu, Buddhist and Jewish religious MGs.ResultsAbout 600 million trips are undertaken to religious sites annually. The characteristics varies between religions and between pilgrimages. However, religious MGs share common health risks, but these are reported in a heterogenous manner. European Christian pilgrimages reported both communicable diseases, such as norovirus outbreaks linked to the Marian Shrine of Lourdes in France, and noncommunicable diseases (NCD). NCD predominated at the Catholic pilgrimage to the Basilica of Our Lady of Guadalupe in Mexico, which documented 11 million attendees in one week. The Zion Christian Church Easter gathering in South Africa, attended by about 10 million pilgrims, reported mostly motor vehicles accidents. Muslim pilgrimages, such as the Arbaeen (20 million pilgrims) and Hajj documented a high incidence of respiratory tract infections, up to 80% during Hajj. Heat injuries and stampedes have been associated with Hajj. The Hindu Kumbh Mela pilgrimage, which attracted 100 million pilgrims in 2013, documented respiratory conditions in 70% of consultations. A deadly stampede occurred at the 2021 Jewish Lag BaOmer MG.ConclusionCommunicable and NCD differ among the different religious MGs. Gaps exists in the surveillance, reporting, and data accessibility of health risks associated with religious MGs. A need exists for the uniform implementation of a system of real-time monitoring of diseases and morbidity patterns, utilising standardised modern information-sharing platforms. The health needs of pilgrims can then be prioritised by developing specific and appropriate guidelines.© The Author(s) 2024. Published by Oxford University Press on behalf of International Society of Travel Medicine.

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