pipeline vaccine pipeline vaccine pipeline vaccine refers to vaccines which are under development. the world health organization's (who) product development for vaccines advisory committee oversees the development of pipeline vaccines. examples the who updates a list of diseases for which vaccine development is in pipeline. as of july 2021, the pipeline vaccines for the following diseases are under development. campylobacter jejuni chagas disease chikungunya enterotoxigenic escherichia coli enterovirus 71 (ev71) group b streptococcus (gbs) herpes simplex virus hiv-1 human hookworm disease leishmaniasis malaria neisseria gonorrhoeae nipah virus infection nontyphoidal salmonella disease norovirus paratyphoid fever respiratory syncytial virus (rsv) schistosomiasis shigella staphylococcus aureus streptococcus pneumoniae streptococcus pyrogenes tuberculosis universal influenza vaccine