Acid/anionic antimicrobial and virucidal compositions and uses thereof

A method of using an antimicrobial composition, comprising:

• contacting an antimicrobial composition to a surface in need of treatment, wherein the antimicrobial composition comprises from about 20 wt-% to about 45 wt-% of at least one weak acid comprising lactic acid, citric acid, tartaric acid, malic acid, gluconic acid, formic acid, acetic acid, propionic acid, ascorbic acid, glutamic acid, levulinic acid, or a combination thereof;
• from about 8 wt-% to about 20 wt-% of at least one strong acid;
• at least one anionic surfactant comprising a sulfonate, sulfate and/or carboxylate;
• and water;
• and wherein the composition is present in an amount of from about 5 ppm to about 10,000 ppm;
• and
• providing at least a 3-log microbial reduction to complete inactivation of a virus,
• wherein the composition is free of quaternary ammonium compounds and additional carboxylic acids;
• and
• wherein no rinse step is required.