Do kids carry infections from daycare? My kid remains fine but as soon as I start his daycare he gets chest infection.

Yes, this is a very common problem. Children are usually safe at home but the daycare environment and interaction with other children (who may have been infected) plays an important role in their general health. One way to help prevent it is boost your kid's immunity by maintaining a regular diet, enforcing sanitary habits -- washing hands, covering cough and sneeze etc. -- in home and in daycare too. Also remember that kids develop immunity by getting exposed to various germs and bacteria. It's part of growing up :)