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Some viruses cause chronic or latent infection Permissive cells allow virus replication and/or viral transformation Nonpermissive cells do not permit virus replication, but may allow viral transformation The outcome of an infection depends on the particular virushost combination and on other factors such as the extracellular environment, multiplicity of infection, and physiology and developmental state of the cell

Studies, including his, suggest that the chemical reactions that break down and construct glucose derivatives, which are normally associated with life, might have existed before the enzymes and genes that enable them in living cells

Therefore, strain ZH-2 can be used as a potential biocontrol agent for the control of the tobacco mildew disease and the improvement of tobacco quality during storage

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Companies are responding to HTP flavors ban by introducing new, tobacco-free products

North America remains the largest market for tobacco products, driven by established consumption patterns and brand loyalty