 Nanotechnology has been used in drug delivery systems since the 1970s, but only recently have there been significant advancements in the field. Nanoparticle-based drugs are now being developed for a variety of applications, from vaccines and cancer treatments to protein and gene therapies. Despite this progress, there are still many challenges that need to be addressed before these drugs can become commercially available. These include the development of safe and effective nanoparticles, the ability to control their release rate, and the potential side effects of using them. This article was authored by Masa Mazdi and Kofi Asariado.