The phrase "to neutralize the virus" means to stop the virus from causing harm or spreading further in the body. It involves disabling or destroying the virus so that it becomes ineffective. Full definition
Although disappointed in the outcome of the STEP trial, Koff says the results will likely give a shot in the arm to a growing effort to identify antibodies capable of neutralizing the virus before it causes a full - blown infection. (scientificamerican.com)
(4) Probiotics are thought to interact with immune cells that live in the gut, stimulating the production of secretory IgA which neutralizes viruses and bacteria in the gut (5) and also affects immune cell function systemically throughout the body. (naturopathiccurrents.com)
Virus that underwent transcytosis under these conditions was infectious, and infectivity was highly influenced by whether or not the antibody neutralized the virus. (sciencedaily.com)