Dear Cristian,
Thanks for the heads up about the strike! I'll be arriving on Friday by plane at MXP at 11:10 AM and was planning to take the recommended Milano Central->Varenna Esino->Esino Lario route by train/bus. Searching on the trenord.it site and trentitalia.com site currently shows no interruption of service on those routes.
Do we know at this point whether these routes will be affected, and if so, is there a recommended alternative?
Thanks again (sorry for breaking the thread, just subscribed to reply),
Erik