COVID-19 Glossary,Pacific Science Center's,Click toexplore!,Bookmark this resource to help you understand common terms associated with the pandemic.,Asymptomatic,Contagious,Coronavirus,COVID-19,Exponentialgrowth,Immunity,Infectious,Pandemic,Vaccine,Virus,SARS-CoV-2,Asymptomatic,Contagious,Coronavirus,COVID-19,Exponentialgrowth,Immunity,Infectious,L-Z,Antibody,Contact tracing,Herd immunity,A-K,Virus,Vaccine,SARS-CoV-2,Pandemic,Mutation,PPE,R0,RNA,Serology,Antibody,Antibodies are proteins your immune system produces to protect you from disease. They fight and neutralize harmful substances and organisms, such as viruses and bacteria.Once activated, antibodies guard against new exposure to substances or organisms like the one that triggered them, and they can remain active for different amounts of time.