European markets fell, for two main reasons.Investors worried about the economic impact of swine flu, as well as concerns in the banking sector. News that Bank of America and Citigroup may need to raise extra capital, following the completion of government stress tests, saw bank shares fall.. Just as small signs of recovery had started to appear,analysts say the markets have now taken fright at a possible flu pandemic. Airline stocks were among the hardest hit, with British Airways continuing to decline. Drug companies are some of the few âreas benefitting. Shares were up for Roche, makers of anti- flu drug Tamiflu and for Glaxosmithkline makers of Relenza.