By Ludwig Burger (Reuters) -Swiss drugmaker Roche’s first quarter sales rose a better-than-expected 10% on strong U.S. demand for rapid COVID-19 antigen tests and drugs including Ocrevus against multiple sclerosis as well as Hemlibra against haemophilia. Quarterly sales rose to 16.44 billion Swiss francs ($17.17 billion), up from 14.93 billion Swiss francs in the year-earlier period, the company said on Monday. That was slightly above a market consensus of about 16 billion francs. The diagnostics division accounted for most of the positive surprise, reporting sales growth of 24% to 5.3 billion…