Public health authorities say Canadians have no need to worry about the prospect of mass quarantines, even in the likely event the coronavirus is discovered here. They said scary images coming from a now isolated Wuhan, a Chinese city with 11 million people, will not be repeated here. In addition to Wuhan, China has shut transportation in at least 12 other cities home to more than 36 million people. While no cases have been reported in Canada, concerns about the virus spreading here have stirred memories of the SARS outbreak in 2003 that killed 44 Canadians. However, Dr. Peter Donnelly with Public Health Ontario, says the situation is now very different from what it was then. Communications are more robust, hospitals have better isolation facilities if needed, and a reliable test is available to detect the coronavirus within 24 hours. Some experts say placing an entire Canadian city under quarantine is against the law and would be ineffective and unenforceable. Steven Hoffman, a professor of global health at York University says measures such as travel bans do not work because people who want to get out will find a way to do so. Daniel Kollek, an emergency physician and a professor at McMaster University says the only way quarantine is effective is if everyone who is infected is contained and locked down.