WASHINGTON (Reuters) - U.S. President Biden will meet with the chief executives of Johnson & Johnson and Merck & Co Inc at the White House on Wednesday after the companies recently announced a COVID-19 vaccine manufacturing deal, a White House official said on Monday. The president had been expected to attend an event with the CEOs during a visit on Wednesday to vaccine manufacturer Emergent Biosolutions, but the trip to the company’s Baltimore facility was canceled, the official said.