Boost your immune system

Bend the left arm and raise the hand up to shoulder level. The palm faces forward. The forearm is perpendicular to the ground. Make Surya Mudra with the left hand (touch the tip of the ring finger to the tip of the thumb). Make a fist of the right hand, pressing the tips of the fingers into the pads at the base of the fingers, extend the index finger. With the extended index finger, gently close off the right nostril. Concentrate at the brow point.

Begin a steady, powerful Breath of Fire (here you can watch Dr. Ram Rattan Singh teaching how to do it). Emphasize the beat at the Navel: the Navel must move.

Continue for 3 minutes. Very gradually increase the time to 5 minutes.

To end: inhale deeply and hold the breath. As the breath is held, interlace all the fingers (beginning with the right thumb uppermost) and put the palms in front at a level just below the throat (in front of the thymus), and about 35cm away from the body. Try to pull the fingers apart with all force. Resist and create a great tension. When you must, exhale. Repeat this sequence 3 more times. On the last exhale, discharge the breath by blowing through your upturned lips, with the tongue curled back on the roof of the mouth. This will seal the upper palate upward. Then relax.