"All the players have to follow the type of advice your mother gave you. Blow dry your hair after the shower and always dress warm," assistant coach Hansi Flick told reporters on Wednesday.
The freezing temperatures at their Erasmia training base near Pretoria have already claimed one victim with midfielder Bastian Schweinsteiger training alone on Wednesday to shake off a cold.
"He will undergo individual training to sweat a bit today so he can train with the team again tomorrow," Flick said.
"We have absolutely no worries. He is on his way to full recovery so he will play."
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