21.   How could I maintain oral hygiene to avoid infection?

22.   In some ways, fatness is a sign of better health, since children who avoid chronic infections grow up to be larger.

23.   The fact that her legs were immersed in cold water helped her avoid infection, Marsh said.

24.   To avoid infection, Tri urged people to diligently drain water areas, such as reservoirs, flower pots and swimming pools.

25.   To avoid an epidemic, health workers are going house to house checking on residents and offering advice on how to avoid infection.

26.   Tropical cities in the interior of the country that have been hit hard in the past have avoided the infection so far.

27.   Hospital employees cover their nose and mouth with surgical masks to avoid infection.

28.   The mass burial would take place for health reasons, in order to avoid any infections spreading, he said.