Vaccines protecting against Helicobacter pylori and hepC are in development (although the latter is proving particularly challenging). Even an Epstein-Barr virus vaccine, which would protect against some kinds of lymphoma, is achieving promising results.
针对幽门螺旋杆菌和丙肝的疫苗正在研发中（尽管后者的困难很大）。就连人类孢疹病毒（Epstein-Barr virus）疫苗（可预防某些种类的淋巴癌）也获得了可喜的成果。