Migrants rest in a sports court as they take part in a caravan heading to Mexico City, in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants children play in a playground as they take part in a caravan heading to Mexico City, in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants take part in a caravan heading to Mexico City, in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril

A migrant boy plays with a ballon during a caravan heading to Mexico City, in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril

Honduran migrants Julio Cesar Gonzalez, 30, and his wife Edith Cantillano, 22 take a rest with their children sick with fever, as they take part in a caravan heading to Mexico City, in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril

Honduran migrant Julio Cesar Gonzalez, 30, inflates a balloon for his daughter sick with fever, as they take part in a caravan heading to Mexico City, in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril

Honduran migrants Julio Cesar Gonzalez, 30, and his wife Edith Cantillano, 22 walk carrying their children sick with fever as they take part in a caravan heading to Mexico City, in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril

Honduran migrant girl sick with fever Alison, 4, holds a lollypop while her dad carries her, as they take part in a caravan heading to Mexico City, in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril TPX IMAGES OF THE DAY

Honduran migrants Julio Cesar Gonzalez, 30, and his wife Edith Cantillano, 22 walk with their children sick with fever on their shoulders retaking their journey heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants taking part in a caravan heading to Mexico City, rest in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants walk on a road while taking part in a caravan heading to Mexico City, in Lazaro Cardenas, Mexico October 27, 2021. REUTERS/Daniel Becerril

Honduran migrants Julio Cesar Gonzalez and his wife Edith Cantillano give medicine for fever to their son Cesar, 2, as they take part in a caravan heading to Mexico City, in Villa Comaltitlan, Mexico October 27, 2021. REUTERS/Daniel Becerril

A migrant child pushes a stroller on a road while taking part in a caravan heading to Mexico City, in Lazaro Cardenas, Mexico October 27, 2021. REUTERS/Daniel Becerril REFILE - CORRECTING LOCATION

A migrant child pushes a stroller on a road while taking part in a caravan heading to Mexico City, in Lazaro Cardenas, Mexico October 27, 2021. REUTERS/Daniel Becerril REFILE - CORRECTING LOCATION

A migrant woman is given water as she and other migrants take part in a caravan heading to Mexico City, in Lazaro Cardenas, Mexico October 27, 2021. REUTERS/Daniel Becerril REFILE - CORRECTING LOCATION

A woman carries a child as she walks with a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants prepare to join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Migrants join a caravan heading to Mexico City, in Huixtla, Mexico October 27, 2021. REUTERS/Daniel Becerril

Honduran migrants Edith Cantillano, 22, carries her son Cesar, 2, as they look for a medical consultation a day before continuing their journey heading to Mexico City, in Huixtla, Mexico October 26, 2021. Picture taken October 26, 2021. REUTERS/Daniel Becerril

Honduran migrants Edith Cantillano, 22 and his husband Julio Cesar Gonzalez, 30, take their children to a medical consultation a day before continuing their journey heading to Mexico City, in Huixtla, Mexico October 26, 2021. Picture taken October 26, 2021. REUTERS/Daniel Becerril

Honduran migrants Edith Cantillano, 22 and his husband Julio Cesar Gonzalez, 30, buy medicines for their children sik with fever a day before continuing their journey heading to Mexico City, in Huixtla, Mexico October 26, 2021. Picture taken October 26, 2021. REUTERS/Daniel Becerril

Honduran migrants Edith Cantillano, 22 and his husband Julio Cesar Gonzalez, 30, take their children to a medical consultation a day before continuing their journey heading to Mexico City, in Huixtla, Mexico October 26, 2021. Picture taken October 26, 2021. REUTERS/Daniel Becerril

A migrant rests after receiving medical help as she and other migrants from Haiti, South America and Central America in an area in Huixtla before they continue with a caravan, heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jacob Garcia TPX IMAGES OF THE DAY

A migrant rests after receiving medical help as she and other migrants from Haiti, South America and Central America in an area in Huixtla before they continue with a caravan, heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jacob Garcia

A migrant rests after receiving medical help as she and other migrants from Haiti, South America and Central America in an area in Huixtla before they continue with a caravan, heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jacob Garcia

A migrant rests next to other migrants from Haiti, South America and Central America in an area in Huixtla before they continue with a caravan, heading to Mexico City, to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jacob Garcia

A woman gives her daughter water as migrants from Haiti, South America and Central America rest in an area in Huixtla before they continue with a caravan, heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jose Torres

Migrants rest on a railway bridge in an area in Huixtla before they continue with a caravan, heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jose Torres

A migrant receives medical help, as migrants from Haiti, South America and Central America rest in an area in Huixtla before they continue with a caravan, heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jose Torres

A migrant receives medical help as other migrants from Haiti, South America and Central America rest in an area in Huixtla before they continue with a caravan, heading to Mexico City, to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jose Torres

Migrants from Haiti, South America and Central America rest in an area in Huixtla before they continue with a caravan, heading to Mexico City,?to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jose Torres

A migrant bathes in a river before continuing the journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants rest before continuing their journey walking in a caravan of migrants from Central America and Haiti heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

A woman walks with a child as migrants from Central America and Haiti join a caravan heading to Mexico City, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Men walk as migrants put clothes to dry before continuing their journey walking in a caravan of migrants from Central America and Haiti heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants put clothes to dry before continuing their journey walking in a caravan of migrants from Central America and Haiti heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants rest before continuing their journey walking in a caravan of migrants from Central America and Haiti heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants rest before continuing their journey walking in a caravan of migrants from Central America and Haiti heading to Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril TPX IMAGES OF THE DAY

A migrant shaves while he bathes in a river before continuing the journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants wash clothes in a river before continuing their journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants wash clothes in a river before continuing their journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants wash clothes in a river before continuing their journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants wash clothes in a river before continuing their journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

A migrant bathes in a river before continuing the journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants wash clothes in a river before continuing their journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

A migrant bathes in a river before continuing the journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril TPX IMAGES OF THE DAY

A migrant bathes in a river before continuing the journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril TPX IMAGES OF THE DAY

Migrants bathe in a river before continuing their journey walking in a caravan of migrants from Central America and Haiti heading Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Daniel Becerril

Migrants, from Haiti, South America and Central America rest in Huixtla before continuing in a caravan headed for Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jacob Garcia

Migrants, from Haiti, South America and Central America rest in Huixtla before continuing in a caravan headed for Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jacob Garcia

Migrants, from Haiti, South America and Central America rest in Huixtla before continuing in a caravan headed for Mexico City to apply for asylum and refugee status, in Huixtla, Mexico October 26, 2021. REUTERS/Jacob Garcia