The invention is plant based nano emulsion solution, a novel non-toxic germicide agent against methicillin-resistant Staphylococcus aureus (MRSA) and Acinetobacter baumannii infection, which is a common threat to public health but with limited therapeutic options. The formulation is also effective in killing viruses including human coronavirus OC43 (hCoV-OC43) in vitro which is a beta coronavirus under the same group as the SARS-CoV-2. It also exhibited good antioxidant properties. Thus, making the invention as unique which be used as dual therapy in managing the infections.