rs twice as often as recommended. ... On every airline, an entirely new batch of air flows into the cabin every two to four minutes." Joseph Allen, Harvard School of Public Health: "So the air quality is quite good on an airplane, better than most indoor environments." Professional Sports Leagues Move Toward Reopening. Dana

been a presenter on community and child health at national meetings of the American Public Health Association, and remains active as a speaker in Harvard School of Public Health alumni activities. EFTA_R1_02030756 EFTA02690459

ations Center in Nigeria • Hamid Jafari, Director, Polio Eradication, Global Polio Eradication Initiative (tbc) • Harvey V. Fineberg, Professor at Harvard School of Public Health (tbc) • Jean-Jacques Muyembe-Tamfum, Director-General of the National Institute for Biomedical Research, and scientific advisor to the WHO • Sakob

spital, Harrisburg, Pennsylvania Harvard Medical School, Massachusetts General Hospital Harvard Medical School, Massachusetts Mental Health Center Harvard School of Public Health Hawaii State Hospital Hawaii State Law Enforcement Officials Association I.B.M. Corporate Headquarters Johns Hopkins University, Department of So