MMWR. Morbidity and mortality weekly report, Vol. 69, no.16, April 24, 2020

Update on Vaccine-Derived Poliovirus Outbreaks \u2014 Worldwide, July 2019\u2013February 2020 / Mary M. Alleman; Jaume Jorba; Sharon A. Greene; Ousmane M. Diop et al. - Cleaning and Disinfectant Chemical Exposures and Temporal Associations with COVID-19 \u2014 National Poison Data System, United States, January 1, 2020\u2013March 31, 2020 / Arthur Chang; Amy H. Schnall; Royal Law; Alvin C. Bronstein; Jeanna M. Marraffa, PharmD4 et al. - Notes from the Field: Outbreak of Human Immunodeficiency Virus Infection Among Persons Who Inject Drugs \u2014 Cabell County, West Virginia, 2018\u20132019 / Amy Atkins; R. Paul McClung; Michael Kilkenny; Kyle Bernstein et al. - Notes from the Field: Multiple Cruise Ship Outbreaks of Norovirus Associated with Frozen Fruits and Berries \u2014 United States, 2019 / Jared R. Rispens; Amy Freeland; Beth Wittry; Adam Krameret al. -- Erratum: Vol. 69, No. SS-4 - QuickStats: Percentage of Currently Employed Adults Aged 6518 Years Who Reported an Average of 646 Hours of Sleep per 24-Hour Period, by Employment Category \u2014 National Health Interview Survey, United States, 2008\u20132009 and 2017\u20132018.2020757