AV-Test.org has 578,702,687 malware samples in its testing database. Over 115 million have been discovered so far during 2016 alone. 4-5 new malware samples are found every second of every day. Android-based malware is also on the rise, with over 16.5 million different samples targeting the smartphone operating system. Almost half of all new Windows malware (49.2%) can be classified as a virus as opposed to 30% in 2015.”]
Source: https://businessinsights.bitdefender.com/five-new-malware-programs-discovered-every-second