Note Regarding Forward-Looking Statements

This website contains forward-looking statements about our business. Forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from that which we expect.

Important factors that could cause our actual results to differ include our continued dependence on our two principal products, the uncertainty of success in commercializing other products including the launch of TYSABRI, the occurrence of adverse safety events with our products, the failure to execute our growth strategy successfully or to compete effectively in our markets, our dependence on collaborations over which we may not always have full control, possible adverse impact of government regulation and changes in the availability of reimbursement for our products, problems with our manufacturing processes and our reliance on third parties, fluctuations in our operating results, our ability to protect our intellectual property rights and the cost of doing so, the risks of doing business internationally and the other risks and uncertainties that are described in our most recent periodic report filed with the Securities and Exchange Commission, which is available at www.sec.gov or by calling our investor relations department at 617.679.2812.

Forward-looking statements speak only as of the date they are posted to this website, and we do not undertake any obligation to publicly update any forward-looking statements, whether as a result of new information, future events, or otherwise.