<p>Motivated by the critical demand for precise thermal control and targeted nanoparticle transport in biomedical systems, this study presents an exact analytical investigation of unsteady magnetohydrodynamic (MHD) thermoconvective flow of carbon nanotube (CNT)-infused blood over an oscillating vertical porous plate. The primary objective is to explore the influence of CNTs, specifically single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) on the velocity, temperature, and concentration profiles of a Casson-type non-Newtonian blood-based nanofluid under the action of an external magnetic field and porous media effects. The governing momentum, energy, and mass transport equations are solved using Laplace and inverse Laplace transform techniques, yielding exact solutions expressed in terms of the complementary error function. The analytical results demonstrate that increasing CNT volume fraction enhances thermal conductivity, leading to improved heat transfer rates, while higher magnetic field strength and Casson parameters suppress the flow velocity due to intensified Lorentz and viscous forces. SWCNTs exhibit greater diffusion but lower heat retention compared to MWCNTs due to their structural and thermal characteristics. A comprehensive sensitivity analysis highlights nanoparticle concentration and magnetic parameters as the dominant factors influencing system performance. The outcomes of this study offer valuable insights for the design of magnetically controlled drug delivery systems, microfluidic diagnostics, and hyperthermia-based therapeutic procedures, where optimization of heat and mass transfer is vital.</p>