MANAS MISHRA and MICHAEL ERMAN PFIZER Inc yesterday raised its forecast for 2021 COVID-19 vaccine sales by more than 70% to $26 billion and said demand from governments around the world trying to halt the pandemic could contribute to its growth for years to come. The company said it expects by the end of this month to file for full approval of the vaccine for people over the age of 16 in the United States, where it is currently only authorized for emergency use. It also expects to hear soon from U.S. regulators on the expansion of the vaccine's emergency…