Low activity by the immune system: This claim asserts that if only the body's immune system were strong enough, it would kill the "invading" or "foreign" cancer. Unfortunately, most cancer cells retain normal cell characteristics, making them appear to the immune system to be a normal part of the body. Cancerous tumors also actively induce immune tolerance, which prevents the immune system from attacking them.
Even with all these remedies, your body will struggle to recover from that annoying cough without proper rest. Once the worst symptoms of a cold or flu have worn off, many people get straight back to their busy lifestyle, which is why coughs can linger for so long for many people! Take things easy for a week or two and make sure to get your 8 hours sleep every night.