Key developments on swine flu outbreaks, according to Centers for Disease Control and Prevention, World Health Organization, and government officials:

• Deaths: 19 confirmed in Mexico and one confirmed in U.S., a toddler from Mexico who died in Texas.

• Confirmed sickened worldwide, 937: 506 in Mexico; 244 in U.S.; 101 in Canada; 40 in Spain; 18 in Britain; eight in Germany; four in New Zealand; two in Italy, France, Israel, and South Korea; one each in Colombia, Costa Rica, Ireland, Switzerland, Austria, Hong Kong, Denmark and the Netherlands.

• U.S. confirmed cases from CDC or states: New York 63; Texas 43; California 29; Arizona 18; South Carolina 15; Delaware 10; Louisiana, seven; Massachusetts seven; New Jersey seven; Colorado four; Florida three; Indiana three; Illinois three; Ohio three; Oregon three; Virginia three; Wisconsin three; Connecticut two; Kansas two; Michigan two; and one each in Alabama, Iowa, Kentucky, Minnesota, Missouri, Nebraska, Nevada, New Hampshire, New Mexico, North Carolina, Pennsylvania, Rhode Island, Tennessee and Utah.

• More U.S. school closings announced, including all 24 schools in a district west of Detroit after a high school student came down with an apparent case of the illness.

• The New Mexico Activities Association’s board of directors suspended all athletic and activity programs for all member schools until further notice.

• Centers for Disease Control and Prevention says about a third of confirmed U.S. cases are people who had been to Mexico and likely picked up the infection there.

• Hong Kong, where severe acute respiratory syndrome killed 299 in 2003, ordered weeklong quarantine of downtown hotel where a Mexican tourist was confirmed to have the illness, trapping 350 guests and employees inside.

• Mexican Foreign Minister Patricia Espinosa complained that China had isolated several Mexicans without reason – and urged Mexicans not to travel to China until the situation was resolved.

• Mexican officials will decide today whether to allow schools and businesses to reopen Wednesday.

• World Health Organization called slaughtering pigs unnecessary because virus is being spread through humans, and it says a swine herd in Canada likely was infected by a farmworker who returned from Mexico.

• U.S. Meat Export Federation, which represents pork and beef interests abroad, estimates that U.S. pork exports have dropped about 10 percent since the swine flu scare started.

• Visitation at all California prisons suspended after an ill inmate at Centinela State Prison in Imperial County is tested for swine flu.

On the Net:

CDC: http://www.cdc.gov/swinefluLOOKING AHEADA big concern about the H1N1 virus is whether it will return, perhaps harder, when regular influenza begins its march here in the fall.

Flu season in the Southern Hemisphere is about to begin, and U.S. authorities will watch how the swine flu circulates there over the coming months as they prepare the first vaccine and then decide whether to order that large amounts of it be produced in the fall.

Production of regular winter flu vaccine is going full-tilt, "to make sure we kind of clear the decks," Health and Human Services Secretary Kathleen Sebelius said on Sunday.

"We are testing the virus strain for H1N1 virus so that we’re ready to go into production later, in a month or two, when we make sure that we have the right dosage and the right tests. So we’ll be ready for both," she said.

In the meantime, health officials...