WHY THE COMMON COLD REMAINS UNCURED
While modern science has made leaps and bounds to cure diseases like polio and smallpox, one feat still remains out of reach. As early as the 1950s, scientists first began looking into the causes of the common cold.1 And to this day, the search for a cure is still ongoing for many reasons.
Challenges to Curing the Common Cold
It’s easy to mistake a bad cold for a flu, but there are differences between them. Colds are generally less severe and don’t come on as suddenly as the flu. Also, certain symptoms are likely to be more prominent.

Viruses change too frequently
Scientists are hard at work trying to develop a vaccine or antiviral drug for the common cold, but rhinovirus strains regularly mutate and create new strains.3 Additionally, each cold season, there can be 20-30 different types of rhinovirus. That makes it hard for public health officials to predict which ones will be around each year.4

Colds are not usually life-threatening
For most people, a cold is just an annoying occurrence that happens a few times per year.3 If there was a vaccine, it would have to carry a very small risk-to-benefit ratio for the FDA to approve it (meaning any potential side effects should be less risky than those of the common cold).4
What you can do
There are a few measures you can take to help lessen the symptoms of a cold. Along with plenty of rest and fluids, a wide variety of over-the-counter medications such as Theraflu® can help temporarily relieve the symptoms of a cold.5
SOURCES
1. Human Rhinoviruses. Clin. Microbiol. Rev. January 2013 vol. 26 no. 1 135-162 Retrieved October 30, 2015 from http://cmr.asm.org/content/26/1/135.full
2. Colds. Retrieved September 18, 2015, from http://www.brown.edu/Student_Services/Health_Services/Health_Education/common_college_health_issues/colds.php
3. Result Filters. Retrieved September 18, 2015, from http://www.ncbi.nlm.nih.gov/pubmed/23757114
4. Clinical Microbiology Review. Retrieved November 9, 2017, from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3553670/pdf/zcm135.pdf
5. Result Filters. (n.d.). Retrieved February 16, 2016, from http://www.ncbi.nlm.nih.gov/pubmed/23391673