The deal comes in a week that AstraZeneca said it was conducting further research to confirm whether its COVID-19 vaccine could be 90% effective, potentially slowing its rollout, and as a rival shot from Pfizer was launched in Britain and approved for use in the United States

Alexion shareholders will receive $60 in cash and 2.1243 AstraZeneca American Depositary Shares per Alexion share, the company said

The S&P 500 ended at its best level since July on Tuesday, helped by a big jump in energy shares and investor confidence that higher interest rates will not derail the economy.

Year 2015 should be regarded as a good year for patients worldwide as the USFDA has given approvals for 45 New Molecular Entity and New Therapeutic Biological Products.

Forbes' annual 'World's Most Innovative Companies' list has been topped by California-based global cloud computing company Salesforce for the fourth year in a row.

Larsen & Toubro, Hindustan Unilever and Infosys are among five Indian firms that are ranked on Forbes' list of 'The World's Most Innovative Companies' topped by four US companies.