Yuvraj Singh is no.3(12 December 1981) running in his unlucky 31st(4) year.
4 is not good for 3.specially for health problems.
Big B got coolie injury in his 40th(4) year & got admitted in hospital in his 67th(4) year.
Saif Ali Khan got admitted in his 40th(4) year due to excessive smoking.
3rd, 12th, 21st, 30th born & Saggitarians & Pisces are Ruled by No 3, Jupiter which is Gaseous & are prone to Respiratory/ lung/ throat problems so must stay away from Dust & Smoke. Down with a Lung Tumor, Yuvraj & even Rajnikant (who was out of hospital for Lung infection) both (12/12) are Double 3's !

I'm a Saggi 3 too and have had my share of Bronchitis since childhood.

Remedy is to wear an Amethyst(Jamuniya) & wear shades of blue, red, violet & purple.
Wishing Yuvraj Singh a speedy but solid recovery. The good news is that he's a Saggitarian, the Symbol is Archer, a Fighter