This smallpox is caused due to varicella virus. The virus can spread by
- Directly From Person to Person - A person can catch smallpox virus by living with someone who has it. An infected person can also spread smallpox by coughing, sneezing or talking. Coming in contact with skin lesions can also spread smallpox from one person to another person.
- Indirectly From an Infected Person - Smallpox can also spread through air inside the buildings infecting other people inside other rooms or floors.
- Contaminated Items - smallpox can spread through coming contact with contaminated clothing and bedding.