The flu virus is very contagious, especially when the weather is uncertain because the immune system tends to weaken. Many ways to prevent transmission of flu, one of them by making sure there is always a pen in your pocket or in the bag.
At first glance sounds absurd and somewhat difficult to imagine that a pen will be able to reduce the risk of transmission of influenza. Objects seremeh pens that cost not just how it is usually available everywhere, then why bother to bring your own?