Pfizer buys biotech firm Seagen for $43 billion
Pfizer-BioNTech to test combined Covid and flu vaccine
UK approves Pfizer bivalent Covid vaccine ahead of booster drive
EU watchdog approves first Omicron jabs
US approves updated Pfizer, Moderna shots targeting Omicron
Moderna sues Pfizer, BioNTech over COVID vaccine
Pfizer to acquire sickle cell drugmaker GBT for $5 bn
Pfizer earnings jump on strong sales of Covid-19 products
US approves Pfizer and Moderna vaccines for youngest children