(especially of diseases) tending to spread from one person to another

contagious (disease)

(of a disease) spreading by contact

communicable

causing, likely to cause, death

causing end of life

causing destruction; fond of, in the habit of, destroying

injurious, devastating

causing, ending in, death

deadly, lethal

(of disease) that can be spread by means of bacteria carried in the air or in water

catching, spreading

causing, able to cause, death

deadly

harmful to life

diseased

who or that cannot live for ever; a person

deadly

harmful

deadly, injurious

extremely harmful, causing distress

bad, hurtful

having poison; causing death or injury

harmful

causing, caused by infection (with disease germs)

harmful

poisonous (the usual word)

poisonous

causing worry, unhappiness, difficulty

bothersome, worrisome