2024 42 CFR 493.831 – Standard; Virology

2023 42 CFR 493.831 – Standard; Virology

2022 42 CFR 493.831 – Standard; Virology

2021 42 CFR 493.831 – Standard; Virology

2020 42 CFR 493.831 – Standard; Virology

2019 42 CFR 493.831 – Standard; Virology

2016 42 CFR 493.831 – Standard; Virology

2015 42 CFR 493.831 – Standard; Virology

2014 42 CFR 493.831 – Standard; Virology

2010 42 CFR 493.831 – Standard; Virology

2009 42 CFR 493.831 – Standard; Virology