Core Insights - The introduction of PD-1 inhibitors in 2014 marked a significant turning point in the fight against cancer, with Bristol-Myers Squibb's Opdivo and Merck's Keytruda leading the charge in immunotherapy [1][3] - The competition between Opdivo and Keytruda has evolved over the years, with Keytruda ultimately becoming the top-selling drug globally by 2024 [21][22] Historical Context - The history of cancer immunotherapy began with William Coley's discovery in the late 19th century, which was followed by a long period of stagnation until the late 20th century when key immune cells were identified [4] - The discoveries of James Allison and Tasuku Honjo regarding CTLA-4 and PD-1, respectively, laid the groundwork for the development of PD-1 inhibitors [5][10] Drug Development - Opdivo was developed with strong backing from Bristol-Myers Squibb after acquiring Medarex in 2009, leading to its approval in Japan in 2014 [12] - Keytruda's development faced initial setbacks but was revitalized by Merck's strategic decision to conduct an unprecedented "super I phase" trial, leading to its approval shortly after Opdivo [14][15][16] Market Dynamics - In 2016, a critical competition occurred between Opdivo and Keytruda in the non-small cell lung cancer (NSCLC) market, which is the largest segment in oncology [17] - BMS's failure in the CheckMate-026 trial led to a significant drop in Opdivo's market position, while Merck's more selective approach in the KEYNOTE-024 trial resulted in Keytruda's success [18][19][20] Sales Performance - By 2024, Keytruda's sales reached $29.5 billion, marking an 18% increase and solidifying its position as the top-selling drug globally [21] - Opdivo, while still a major player, saw its sales decline but remained above the $10 billion mark, maintaining its status as a heavyweight in the market [22][23] Competitive Landscape - The global PD-1 inhibitor market is highly competitive, with 527 candidates in development as of early 2025, including 20 approved drugs [26][29] - In China, the market is characterized by intense competition among local manufacturers, with significant price reductions due to national healthcare negotiations [30][31] Future Outlook - Keytruda's core patent is expected to expire in 2028, potentially leading to a significant drop in sales as biosimilars enter the market [32] - A new challenger, Ivonescimab, has shown superior efficacy compared to Keytruda in clinical trials, indicating a shift towards dual-target therapies in cancer treatment [33][35]

Policy Developments - The National Health Commission will enhance investment guarantees for childcare services, aiming for significant improvements in service quality by the end of 2027, including better management systems and increased registration rates for childcare institutions [2] Drug and Device Approvals - Bristol-Myers Squibb's Opdivo has been approved by the European Commission for use in a perioperative treatment regimen for high-risk resectable non-small cell lung cancer (NSCLC) patients, marking it as the first PD-(L)1 inhibitor approved for this indication in the EU [4] Capital Markets - Jiuzhoutong announced a participation in establishing a 25 million yuan industry fund, with a significant contribution of 22.99 million yuan, indicating a strategic move to foster innovation in pharmaceuticals and digital healthcare [5] - AbbVie has entered a collaboration with ADARx Pharmaceuticals to develop small interfering RNA (siRNA) therapies across multiple disease areas, with an upfront payment of $335 million and potential milestone payments totaling billions [6][7] Corporate Changes - Bluefan Medical announced a change in its indirect controlling shareholder, with Langhui Petrochemical acquiring a 52.0395% stake in Bluefan Investment, although the actual controller remains unchanged [8] - ST Muyu will remove risk warnings and change its name to Tianmu Pharmaceutical starting May 20, 2025, with an increase in daily price fluctuation limits from 5% to 10% [9] Industry Events - WuXi AppTec's investee company Hanbang Technology was listed on the Shanghai Stock Exchange on May 16, 2025, with WuXi holding 6.04% of the total shares post-IPO [10] Market Sentiment - Jinhe Biology's controlling shareholder plans to reduce its stake by up to 3% of the total shares, primarily to repay pledged debts [11] - ABA-Bio has completed a reduction of its stake in Yifang Bio by 9.23 million shares, representing 1.60% of the total shares [12]