Further emotional strain followed in October when his father was hospitalized for a serious respiratory infection.
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He is said to have suffered a severe respiratory infection following the latest surgery.
Influenza is basically an extreme upper respiratory infection, and, by itself, is rarely fatal.
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They first revealed that the Venezuelan president had a respiratory infection more than two weeks ago.
He also was treated for an acute respiratory infection in 2011, among other recurrent bouts of illness.
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The virus can be transmitted through the air from respiratory infection or by close contact between horses.
Retrospective testing of recently reported cases with severe respiratory infection may uncover additional cases that were previously unrecognized.
While in Cuba, Chavez suffered severe respiratory infection in late December that nearly killed him, Maduro said last week.
Last week, the country's information minster said Chavez was battling a respiratory infection.
But in late 1999 he met his match in "Dallas crud, " what he thought was a nasty upper respiratory infection.
Last seen in public late last year, he was reported to have suffered a severe respiratory infection after treatment in Havana.
Three of the 110 hospital and clinic workers who have overseen the patient have developed symptoms of upper-respiratory infection, the statement said.
"The severe respiratory infection has been overcome, although there remains a certain degree of respiratory inefficiency, which is being treated, " he said.
Mandela also was treated for an acute respiratory infection in January 2011.
"We have been informed of new complications that arose as a consequence of the respiratory infection we already knew about, " he said.
Consider the case of measles, a severe respiratory infection, which still kills close to 200, 000 people a year worldwide despite massive vaccination efforts.
Maduro said Chavez, 58, had suffered new complications that emerged as a result of a respiratory infection the Venezuelan president has been battling.
They found that the diabetic children were significantly less likely to have had a severe respiratory infection during the first year of their life.
The former army officer suffered complications linked to excessive bleeding during his latest procedure on Dec. 11 and grappled with a respiratory infection in recovery.
Mandela, 94, was treated for an acute respiratory infection in 2011.
He was also treated for an acute respiratory infection in 2011.
On Saturday, Venezuelan Information Minister Ernesto Villegas said President Chavez "had overcome" the respiratory infection he had contracted following his fourth cancer surgery on 11 December.
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In January 2011, Mandela was admitted to a Johannesburg hospital for what officials initially described as tests but what turned out to be an acute respiratory infection.
While officials have previously mentioned the respiratory infection and described Chavez's health situation as delicate, Thursday night's statement was notably different from past government announcements, Huerta said.
West scored 11 points and had 14 rebounds despite playing with an upper respiratory infection that prompted Vogel to send him home early from the Pacers' morning shootaround.
The new germ, a respiratory infection, was first seen in the Middle East and so far has sickened more than 40 people worldwide, killing about half of them.
Mr Chavez has not been seen in public since he had further cancer surgery in Cuba in December and is reported to have a severe a respiratory infection.
Mandela was treated for an acute respiratory infection in 2011.
EHV-1 can be transmitted through the air from respiratory infection or by close contact between horses and although it can be treated, in some cases it can be fatal.
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