Curd or yoghurt is an extremely valuable immune stimulating food. It has been regarded as an age-old-fighter of disease and a powerful protector against viruses, infections and tumour cells. Eating curd stimulates atleast two vital components of immunity, namely nature killer cells and gamma interferon.
If a person starts eating curd or yoghurt three months before pollen season or cold season, it can build up his immunity, considerably reducing his susceptibility to both these aggravations.
The yoghurt eaters also had a very few symptoms of hay fever and allergies. Further, those eating yoghurt daily had about 25 percent less cold during a year than the non-yoghurt eaters.