Plague, or black death, is caused by
Aicosahedral virus.
Bbacterium escherichia coli.
Cbacterium yersinia pestis.
Dyeasts.
Evaricella-zoster virus.
Aicosahedral virus.
Bbacterium escherichia coli.
Cbacterium yersinia pestis.
Dyeasts.
Evaricella-zoster virus.