of our human health R&D projects and for ensuring that our company is focusing its R&D resources in the areas where we believe that we can be most successful and maximize our return on investment. We believe that this approach also serves to maximize accountability and flexibility.

Our Research Units are organized in a variety of ways (by therapeutic area or combinations of therapeutic areas, by discipline, by location, etc.) to enhance flexibility, cohesiveness and focus. Because of our structure, we can rapidly redeploy resources, within a Research Unit, between various projects as necessary because the workforce shares similar skills, expertise and/or focus.

Our platform-services organizations, where a significant portion of our R&D spending occurs, provide technical expertise and other services to the various R&D projects, and are organized into science-based functions such as Pharmaceutical Sciences, Chemistry, Drug Safety, and Development Operations, and non-science-based functions, such as Facilities, Business Technology and Finance. As a result, within each of these functions, we are able to migrate resources among projects, candidates and/or targets in any therapeutic area and in most phases of development, allowing us to react quickly in response to evolving needs.

Generally, we do not disaggregate total R&D expense by development phase or by therapeutic area since, as described above, we do not manage a significant portion of our R&D operations by development phase or by therapeutic area. Further, as we are able to adjust a significant portion of our spending quickly, as conditions change, also as described above, we believe that any prior-period information about R&D expense by development phase or by therapeutic area would not necessarily be representative of future spending.

Product Developments—Biopharmaceutical

We continue to invest in R&D to provide potential future sources of revenues through the development of new products, as well as through additional uses for in-line and alliance products. Notwithstanding our efforts, there are no assurances as to when, or if, we will receive regulatory approval for additional indications for existing products or any of our other products in development.

We continue to closely evaluate our global research and development function and pursue strategies intended to improve innovation and overall productivity in R&D by prioritizing areas that we believe have the greatest scientific and commercial promise, utilizing appropriate risk/ return profiles and focusing on areas that we believe have the highest potential to deliver value in the near term and over time. To that end, our research primarily focuses on five high-priority areas that have a mix of small and large molecules—immunology and inflammation; oncology; cardiovascular and metabolic diseases; neuroscience and pain; and vaccines. In addition to reducing the number of disease areas of focus, we have realigned and reduced our research and development footprint and outsourced certain functions that do not drive competitive advantage for Pfizer.

Our development pipeline, which is updated quarterly, can be found at