How did Covid-19 spread from Selayang to other wet markets?

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Covid-19 Spread from Selayang Wholesale Market to Other Wet Markets

The Covid-19 virus spread from the Selayang wholesale market in Kuala Lumpur to other wet markets through traders who purchased goods from Selayang and subsequently sold them in their local markets. This transmission chain was initiated by an individual linked to the Seri Petaling mosque tabligh gathering who worked at the Selayang wholesale market, infecting others there.
Origin of the Selayang Market Outbreak

Authorities believe the outbreak at the Selayang wholesale market originated from a worker who attended the mass tabligh gathering at the Seri Petaling Mosque. This individual is thought to have subsequently infected other individuals within the wholesale market environment.
Inter-Market Transmission Mechanism

A total of 74 Covid-19 cases were identified at the Selayang wholesale market. Of these, 13 cases were found to have been infected outside the market premises, indicating that the virus had already spread beyond the wholesale market itself. Traders from other wet markets frequented the Selayang wholesale market to procure goods. Upon returning to their own markets, these traders, potentially already infected, facilitated the onward transmission of the virus to new locations.
Response to Market Clusters

Upon identifying new Covid-19 cases linked to a specific market, authorities immediately implement a shutdown of the affected market for sanitisation and decontamination procedures. This protocol is consistently applied to all identified market clusters.
Contact Tracing and Screening Efforts

Contact tracing is a critical component of the response, focusing on close contacts of infected individuals. This methodology, similar to that used during the initial wave of Covid-19, is being employed across various markets, including those in Petaling Jaya (Taman Megah and Jalan Othman) and the Chow Kit Market in Kuala Lumpur. At the Selayang wholesale market specifically, approximately 15,000 screenings were conducted, identifying 74 positive cases, representing an infection rate of around 4%.

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How did Covid-19 spread from Selayang to other wet markets?

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