Thanks for sharing very useful information.
IN addition- *Drinking warm water with lemon is useful for cold & throat infection.
*Tamarind with pepper rasam is effective for cold. As one take , the nose & eyes water & the nasal obstruction is cleared. It is one of common & effective home remedy for cold.
* Turmeric powder is popular home remedy for cold- Take 1/2tsp of turmeric powder with warm milk , drink once or twice in a day for best result. It will raises the discharge from the nose & provide quick relief.