DNA has proven to be a surprisingly convenient means for information storing: it allows you to achieve such data density that magnetic or silicon carriers cannot provide. So data storage systems based on DNA are widely used as devices for a cold backup.
However, they are susceptible to viruses – ordinary ones, including those influencing humans. For example, influenza virus can easily damage the storage inserting itself instead of part of the data. An attacker who wants to cause a failure in the working process of a competing company, can simply infect its employees who are in the data center with influenza or chickenpox.