The article mentions outcomes based on duration of lasting immunity to the virus, in particular the "annual winter outbreaks" pattern holds if immunity lasts le

The article mentions outcomes based on duration of lasting immunity to the virus, in particular the "annual winter outbreaks" pattern holds if immunity lasts less than 40 weeks. This should be something we can determine in the near future right? If the outbreak started in China in mid or late december, then early infectees of the virus should already be around week 35 or so.