Pfizer Inc (LON:0Q1N) is an American pharmaceutical multinational company. In Fortune’s 500 list for 2020’s largest US companies, it is at rank 64. Pfizer’s products are created by 1500 scientists in over 500,000 labs and over 36 clinical trials. The company’s research and development programme on vaccines are focused on ways of preventing pneumococcal disease. Pfizer strives to increase access of its vaccines where they are needed the most.