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.
Most exit row seats provide a few more inches of seat pitch compared to non-exit row seats so that passengers have more space to access the exit. Seats in front of an exit row may not be able to recline, which can limit their comfort on longer flights. few airlines have gone to branding exit row seats as a premium economy product-on Virgin America's A320, the exit rows (as well as bulkhead seats) are considered  Main Cabin Select  where meals, alcohol, pay-per-view movies and a higher baggage allowance are all included.