Firefighters disinfect a square against the new coronavirus, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)

In this Jan. 30, 2020, photo, Ali Akbar Velayati, adviser to the Iranian supreme leader Ayatollah Ali Khamenei, gives a press conference, in Tehran, Iran. In hard-hit Iran, state-run TV announced that Velayati was quarantined at home after testing positive for the virus. He is a close, trusted adviser to the 80-year-old leader of the Islamic Republic, who was recently seen wearing disposable gloves at a tree-planting ceremony, apparently out of caution about the virus. (AP Photo/Vahid Salemi)

A firefighter disinfects a square against the new coronavirus, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)

In this Jan. 30, 2020, photo, Ali Akbar Velayati, adviser to the Iranian supreme leader Ayatollah Ali Khamenei, waves to media at the conclusion of his press conference, in Tehran, Iran. In hard-hit Iran, state-run TV announced that Velayati was quarantined at home after testing positive for the virus. He is a close, trusted adviser to the 80-year-old leader of the Islamic Republic, who was recently seen wearing disposable gloves at a tree-planting ceremony, apparently out of caution about the virus. (AP Photo/Vahid Salemi)

In this photo released by the official website of the office of the Iranian Presidency, cabinet members wearing face masks attend their meeting in Tehran, Iran, Wednesday, March 11, 2020. Senior Vice-President Eshaq Jahangiri and two other Cabinet members have contracted the new coronavirus, semiofficial Fars News Agency reported Wednesday. The vast majority of people recover from the new virus. (Iranian Presidency Office via AP)

A firefighter disinfects a sidewalk the against new coronavirus, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)

Firefighters disinfect a square against the new coronavirus, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)

Firefighters disinfect a street against the new coronavirus, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)

Firefighters disinfect a street against the new coronavirus, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)

Firefighters prepare their fogging machines to disinfect a street against the new coronavirus as people watch, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)

Firefighters prepare to disinfect a street against the new coronavirus, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)

A firefighter disinfects the shrine of Saint Saleh to help prevent the spread of the new coronavirus in northern Tehran, Iran, Friday, March, 6, 2020. A Health Ministry spokesman warned authorities could use unspecified "force" to halt travel between major cities. (AP Photo/Ebrahim Noroozi)

Firefighters disinfect a square against the new coronavirus, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)

Firefighters prepare their fogging machines to disinfect a street against the new coronavirus as some people watch and pedestrians walk, in western Tehran, Iran, Friday, March 13, 2020. The new coronavirus outbreak has reached Iran's top officials, with its senior vice president, Cabinet ministers, members of parliament, Revolutionary Guard members and Health Ministry officials among those infected. The vast majority of people recover from the new coronavirus. According to the World Health Organization, most people recover in about two to six weeks, depending on the severity of the illness. (AP Photo/Vahid Salemi)