Cautious optimism was the theme during a J.P. Morgan Healthcare Conference week that featured patchy skies, large-but-not-mega deals and a surfeit of sideline summits around San Francisco’s Union Square. BioCentury’s editorial team discusses the week’s M&A deals, including J&J's $2 billion takeout of ADC company Ambrx, and Merck & Co. acquiring T cell engager biotech Harpoon for nearly $700 million; takeaways from the Sachs Neuroscience Innovation Forum and other adjacent forums; ...