The flu, like a cold, is a respiratory infection but is caused by an entirely different group of viruses - namely the influenza A, B and C viruses. Perhaps the best way to prevent the flu is to get an annual flu shot before the flu season hits.
I called Lufthansa, and they told me that there are Economy Plus seating sections on the Bangalore to Frankfurt and Frankfurt to Chicago legs. But, since I bought tickets through United, they told me I can't get any seat assignments until check-in in Bangalore unless I work with United.
Baggage fees. For Lufthansa guests the following fees2/9 apply if their checked baggage meets the allowed pieces. but possibly exceeds in weight and/or dimension1: Baggage fees that possibly exceeds weight and/or dimension1. Economy Class and Premium Economy Class. Within Europe / between. third countries.