Core Insights - The recent outbreak of Nipah virus in West Bengal, India, has raised significant concern due to its high mortality rate and potential for human-to-human transmission [2][3] Group 1: Virus Overview - Nipah virus (NiV) is not a new virus; it was first identified in Malaysia in 1998 and belongs to the Henipavirus genus of the Paramyxoviridae family [2] - There are two subtypes of Nipah virus: the Malaysian subtype with a mortality rate of approximately 15% and the Bangladeshi subtype with a mortality rate ranging from 40% to 70% [2] - The virus primarily attacks the brain and lungs, leading to symptoms such as fever, headache, respiratory difficulties, and loss of consciousness, and can cause severe respiratory diseases like atypical pneumonia and acute respiratory distress syndrome [2] Group 2: Transmission - The natural host of Nipah virus is fruit bats, and it can be transmitted from animals to humans through contact with infected bodily fluids [3] - Recently, human-to-human transmission has been observed, marking a new characteristic of recent outbreaks [3] - High-risk groups include healthcare workers in contact with patients and slaughterhouse workers who handle infected animals [3] Group 3: Prevention - The transmission efficiency of Nipah virus through general social contact is low, primarily spreading through close contact rather than airborne routes like influenza or measles [4] - Public health measures focus on increasing awareness and implementing scientific protective measures to significantly reduce infection risk [4] - Nipah virus cases are mainly reported in tropical regions such as India and Malaysia, with no cases reported in China as of now [4]