CARACAS, Venezuela — Venezuela’s vice president went to Cuba on Friday to visit the ailing Hugo Chavez and his family, while the leaders of Argentina and Peru also traveled to Havana saying they hoped to ask about the Venezuelan president’s condition.

The 58-year-old president is fighting a severe respiratory infection a month after he underwent cancer surgery in Havana, his government says.

“I’m leaving for Havana to continue that work of visiting the family, meeting with his medical team, visiting our commander president,” Vice President Nicolas Maduro said in Caracas.

Chavez hasn’t spoken publicly or been seen since before his Dec. 11 operation, his fourth cancer-related surgery since June 2011 for an undisclosed type of pelvic cancer.