Early-stage evidence from cases in Shenzhen finds at least one in nine household contacts at risk of being infected by first carrier MUMBAI : The eastern Chinese city of Shenzhen, more than 1,000 km from Wuhan, detected its first possible novel coronavirus infection on 8 January.
Soon after, surveillance systems were put in place for close contacts of suspected and confirmed patients. Data collected at the time now shows that patients passed on the virus to at least one in every nine household contacts and children were as much at risk as adults.
The study published in The Lancet analysed 391 covid-19 patients and 1,286 close contacts, or those who had stayed, travelled, or had a meal with the patients, in Shenzhen between 14 January and