virus 96 slot virus4d nawala A virus is an infectious microbe consisting of a segment of nucleic acid either DNA or RNA surrounded by a protein coat. A virus cannot replicate alone; instead, it must infect cells and use components of the host cell to make copies of itself. Often, a virus ends up killing the host cell in the process, causing damage to the host organism
virus influenza a Influenza viruses attach to cells with a surface viral protein called hemagglutinin HA. The HA latches on to sugar glycan molecule receptors on cells to cause infection. Avian bird influenza
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