Health Care Roundup: Market Talk - WSJ

1. Novartis guides for mid-to-high single-digit sales growth, beating consensus expectations. 2. ResMed's CEO claims weight-loss drugs increase awareness of sleep apnea. 3. Sanofi announces a $5.21 billion buyback, exceeding investor expectations. 4. Roche's results meet expectations; diagnostics segment lags behind. 5. U.S. oil-and-gas deals reached $105 billion, showing robust acquisition activity.