CHRIS BJORNBERG / SCIENCE PHOTO LIBRARY CHRIS BJORNBERG / SCIENCE PHOTO LIBRARY
Computer illustration showing Hepatitis A infecting liver tissue. Hepatitis A Virus (HAV) has a small icosahedral capsid spanning only 30nm. Transmitted by an oral faecal route, the virus has an ability to infect liver tissue cells, or hepatocytes, and cause a moderately severe illness lasting a month or so.
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