What factors come into play in the spread of these diseases? And what can we do to counter them?
Human and animal diseases are often caused by viruses or bacteria. Over the past two hundred years, vaccines have eradicated some of these diseases. Others have returned to haunt humans with new and ever mutating strains or revived when vaccination programs were interrupted. Communicable diseases may spread in different ways: through blood, air, feces/urine, food, […]