Nearly all of us feel a little blue or a little down every now and then. It happens. Occasional temporary feelings of sadness are a natural part of life. However if you frequently feel this way, or if the feelings are excessive, you may be suffering from depression.
Viruses are mostly known for their aggressive and infectious nature. It’s true, most viruses have a pathogenic relationship with their hosts – meaning they cause diseases ranging from a mild cold to serious conditions.