Smallpox (also known by the Latin names Variola or Variola vera) is a contagious disease unique to humans. Smallpox is caused by either of two virus variants named Variola major
Tag: viral infection
InfluenzaInfluenza
Influenza, commonly known as flu is an infectious disease of birds and mammals caused by RNA (Ribonucleic Acid) viruses of the family Orthomyxoviridae. There are three types of influenza virus:
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