Migrants pray at the government-run Leona Vicario migrant shelter, temporarily closed by health authorities following a varicela outbreak between Central American migrants that have been sent by the U.S. government to wait out their asylum court dates in Mexico, in Ciudad Juarez, Mexico December 27, 2019. REUTERS/Jose Luis Gonzalez 

A migrant carrying his daughter prays at the government-run Leona Vicario migrant shelter, temporarily closed by health authorities following a varicela outbreak between Central American migrants that have been sent by the U.S. government to wait out their asylum court dates in Mexico, in Ciudad Juarez, Mexico December 27, 2019. REUTERS/Jose Luis Gonzalez TPX IMAGES OF THE DAY 

Migrants pray at the government-run Leona Vicario migrant shelter, temporarily closed by health authorities following a varicela outbreak between Central American migrants that have been sent by the U.S. government to wait out their asylum court dates in Mexico, in Ciudad Juarez, Mexico December 27, 2019. REUTERS/Jose Luis Gonzalez 

A general view shows the government-run Leona Vicario migrant shelter, temporarily closed by health authorities following a varicela outbreak between Central American migrants that have been sent by the U.S. government to wait out their asylum court dates in Mexico, in Ciudad Juarez, Mexico December 27, 2019. REUTERS/Jose Luis Gonzalez 

A migrant removes his dry clothes at the government-run Leona Vicario migrant shelter, temporarily closed by health authorities following a varicela outbreak between Central American migrants that have been sent by the U.S. government to wait out their asylum court dates in Mexico, in Ciudad Juarez, Mexico December 27, 2019. REUTERS/Jose Luis Gonzalez 

A general view shows the government-run Leona Vicario migrant shelter, temporarily closed by health authorities following a varicela outbreak between Central American migrants that have been sent by the U.S. government to wait out their asylum court dates in Mexico, in Ciudad Juarez, Mexico December 27, 2019. REUTERS/Jose Luis Gonzalez 

Lead medical assistant Fengmei Lin administers a chickenpox vaccine to one-year-old Bella Huang at the International Community Health Services clinic in Seattle, Washington, U.S., March 20, 2019. Picture taken March 20, 2019. REUTERS/Lindsey Wasson 

Maria Meza, a 40-year-old migrant woman from Honduras, part of a caravan of thousands from Central America trying to reach the United States, shows the skin of her daughter Saira Mejia Meza who got chickenpox, as they have an interview with a local media at a temporary shelter in Tijuana, Mexico, November 27, 2018. Their family was depicted in a Reuters photo of November 25 running away from tear gas. REUTERS/Kim Kyung-Hoon 

A rainbow emerges over Kan-Abag mountain and the farming village of Guinsaugon buried by a mudslide near Saint Bernard town in Southern Leyte province in Central Philippines February 22, 2006. Concerns rose for the welfare of survivors from a deadly Philippine landslide as chickenpox and other infectious diseases broke out in packed evacuation centres. REUTERS/Bobby Yip 

A rainbow emerges over Kan-Abag mountain and the farming village of Guinsaugon buried by a mudslide near Saint Bernard town in Southern Leyte province in Central Philippines February 22, 2006. Concerns rose for the welfare of survivors from a deadly Philippine landslide as chickenpox and other infectious diseases broke out in packed evacuation centres. REUTERS/Bobby Yip 

President George W. Bush leaves the Crawford, Texas United Methodist
church with parishioners, August 12, 2001. Bush, defending his policy
on stem-cell research funding, said on Sunday that chickenpox vaccine
provided an ethical precedent for the medical use of human embryos.
Bush is vacationing on his nearby ranch for the month of August.

RTW/HK 

President George W. Bush arrives at the Crawford, Texas United
Methodist church with wife Laura, August 12, 2001. Bush, defending his
policy on stem-cell research funding, said on Sunday that chickenpox
vaccine provided an ethical precedent for the medical use of human
embryos. Bush is vacationing on his nearby ranch for the month of
August.

RTW/HK 

President George W. Bush arrives at the Crawford, Texas United
Methodist church with wife Laura, August 12, 2001. Bush, defending his
policy on stem-cell research funding, said on Sunday that chickenpox
vaccine provided an ethical precedent for the medical use of human
embryos. Bush is vacationing on his nearby ranch for the month of
August.

RTW/HK