Gatchalian and DepEd proposed certain measures to be implemented during the opening of classes, such as the airing lectures on television and radio, a "mandatory face mask policy", maintaining physical distancing, and limiting class sizes. In June, officials reported that schools will not open until a vaccine is available, though remote learning should resume at the end of August. The NEDA reported that the coronavirus pandemic would incur a ($448 million) monthly loss of tourism revenue for the Philippines and the impact of the pandemic could last around five to six months based from past experiences from the SARS, H1N1, and the MERS outbreaks. Over 5,200 flights covering two months, which was to be serviced by member airlines of the Air-Carriers Association of the Philippines, were canceled. Meanwhile, the Asian Development Bank predicts a ($2.2 billion) loss in the tourism sector, while the Tourism Congress of the Philippines estimates the figures at around ($395 thousand), considering that 12.7% of the Philippines' GDP is generated through tourism. Europe Solidaire Sans Frontières also reported potential damage in Philippine tourism. The National Museum of the Philippines temporarily closed its complex in Manila and all branch museums throughout the country. On March 13, the National Parks Development Committee also closed Rizal Park and Paco Park until further notice while the Intramuros Administration closed several sites in Intramuros, including Fort Santiago, Museo de Intramuros, and Casa Manila. Rizal Park partially reopened on July 1, 2020 for jogging and exercise activities only. The Philippine Shopping Festival, a nationwide mall sale event backed by the Department of Tourism originally scheduled on March 1–31 was postponed due to the COVID-19 pandemic. Several local festivals across the country were also either canceled or postponed due to the ongoing COVID-19 pandemic, including Panagbenga Festival in Baguio, Kadayawan sa Dabaw Festival in Davao City, Moriones Festival in Marinduque, and San Pedro Cutud Lenten Rites in Pampanga. The impact of COVID-19 in prisons in the Philippines is projected to be "dangerous," since its jails have the highest occupancy rate in the world that stands at 534%. The Bureau of Jail Management and Penology has temporarily suspended the acceptance of visitors in prisons it manages as early as March 2020, encouraging would-be visitors to avail the "e-dalaw" service which would allow inmates to communicate with relatives online.