Before revision:  Though conventional techniques of virus detection have succeeded in detecting these viruses to some extent, they are time consuming, expensive and require a lot of manpower. Plasmonic biosensors can become a promising alternative to the conventional techniques .
After revision:  Though conventional techniques of virus detection have succeeded in detecting these viruses to some extent, these techniques are time-consuming, costly, and require trained human-resources. Plasmonic metamaterial-based biosensors might pave the way to low-cost rapid virus detection .