The Silent Risk No Couple Should Ignore. A Call to Action on Thalassemia. In states like West Bengal, up to 1 in 10 people are silent carriers of Thalassemia. If you and your partner are both carriers, your child faces a 25% chance of developing a severe, lifelong blood disorder. Rotary Club of Calcutta Jadavpur has sounded the alarm. Watch our Experts full video for detailed insights. We have the power to stop this.