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.
Passengers who have a Star Alliance Gold Card, however, do not have access to the Lufthansa Lounges. Exceptions to this are the Star Alliance Gold Card customers of the airlines United Airlines (UA) and All Nippon Airways (NH), who receive access to Lufthansaâs Senator and Business Lounges.