The common cold is just a common condition; It is mainly a viral infection caused by around 200 different types of viruses. The common cold is harmless and usually affects people during the cold seasons. The symptoms of common cold mainly ...
Now a days there is a much hype of a scary respiratory tract disease called swine (meaning pig) flu (meaning influenza) or H1N1 flu as it is caused by H1N1 virus. No wonder that this deadly virus claimed many lives ...