My son is 2 yrs & 5 months, he has caught Viral gasterinteritus, Rota virus & now Rota virus again!! all in 3 months the first bug did not go for 3 weeks, we had a very tramatic birth & I just wonder would his immune systen be low??, or is it going to different soft plays? they are such aggresive bugs, he has vitamin drops & is still being breast fed at night, although wanting to wean as soon as he is well, what else can anyone suggest I do. we have stopped swimming since Nov. Thanks