Moderna Inc (MRNA.O) raised its 2021 sales forecast for its COVID-19 vaccine by 4.3% to $19.2 billion on Thursday, reflecting demand from countries looking to return to normalcy through rapid inoculation.Earlier this week, Larger rival Pfizer Inc (PFE.N) said it expects $26 billion in sales of its COVID-19 vaccine this year. read moreModerna had in February forecast vaccine sales of $18.4 billion.Since then, wealthy nations have been stocking up shots from Moderna and Pfizer Inc (PFE.N)/BioNTech SE (22UAy.DE) after safety concerns and production problems temporarily sidelined AstraZeneca Plc (AZN.L) and Johnson & Johnson (JNJ.N) vaccines.In the first quarter ended March 31, Moderna's vaccine brought in sales of $1.7 billion.The company said it plans to file for full approval of the vaccine in the United States this month.Source- Reuters