Dec. 2 (UPI) -- As a new blood tests capable of detecting dozens of cancers in their early stages are hitting the market, disease prevention advocates say political and economic momentum is building for what they call a game-changing breakthrough in diagnostics. Excitement over the potential of multi-cancer early detection tests, or MCEDs, has been growing since 2021, when GRAIL, a California-based medical technology start-up, first introduced Galleri, which it says can detect more than 50