Colds going around

We have this icky cold going around our house... it seems that the boys are immune so far but the girls have it full force. We have done almost everything to subside the symptoms but I wish it would just go away! Someone told me it was because of the weather... is this an old wives tale or is there correlation between the weather (going from cold to warm then back again) and catching a cold? I always thought it was from germs/virus'?

    I have been taking airborne chewable tablets ... I tell you the minute I ran out I got this darn cold!
    About Magen
    Birth: December 31
    On since: Sep 14, 2013