Hi, here's a quote from a piece of news about a woman finding maggots in her ear:
Rochelle's ordeal features in a new Discovery Channel documentary, called 'Bugs, Bites and Parasites' that follows the work of specialists who are faced with patients exhibiting a variety of mysterious symptoms - more often than not from people who have travelled abroad.
On her arrival back in the UK, Rochelle became increasingly concerned there may be something seriously wrong, so she visited her local Accident and Emergency department at the Royal Derby Hospital.
Initially doctors weren't concerned by her symptoms and presumed that they had developed because of a minor ear infection or an infected mosquito bite.
1. Does feature here mean to become the main subject (of the documentary "Bugs, Bites and Parasites")?
2. Is "be concerned by" an idiom?
Does it imply that the doctors didn't take Rochelle's illness seriously?
Feature: feature - definition of feature by Macmillan Dictionary
The doctors not being concerned means they were not worried about it because they thought Rochelle's symptoms did not correspond to any grave condition. It does NOT mean they did not take it seriously, just that they thought it was something minor.
Please be aware that I'm neither a native English speaker nor a teacher.