text: Current research aims to develop new and less invasive vaccines that protect from airborne<unk>  of Yersinia pestis.
option_0: Yersinia pestis infection future or investigational therapies
option_1: Yersinia pestis infection medical therapy
option_2: Yersinia pestis infection primary prevention
option_3: Salmonellosis future or investigational therapies
option_4: Brucellosis medical therapy
option_5: Yersinia pestis infection cost-effectiveness of therapy
option_6: Brucellosis primary prevention
option_7: Listeriosis future or investigational therapies