The Coronavirus Family, Its existence in mammals for centuries and The Future
Coronavirus (CoVs) have existed in mammals for centuries, historically, believed to only cause agriculturally devastating diseases in wild and domestic animals and the common cold type of symptoms in humans. Then in 2002, severe acute respiratory syndrome coronavirus (SARS-CoV) emerged from China resulting in the deaths of over 770 people. 10 years later, Middle East respiratory syndrome coronavirus (MERS-CoV) emerged from Saudi Arabia, with MERS-CoV continuing to cause outbreaks and as of Nov 2019 resulting in a total of 2,494 confirmed cases in 27 countries with 858 fatalities. With CoVs now understood to be widespread through mammals tested around the globe, another spill-over event was inevitable if no precautions and importance was put on understanding the risks of this zoonotic disease spread. To date, more than 200 novel coronaviruses have been found in bats and ~35% of bat virome sequenced to date is composed of coronaviruses. Their and other mammals unique immune systems need to be the focus of future research with reports estimating mammal populations to harbour viruses in numbers up to 300 thousand. The SARS-CoV-2 pandemic is devastating with cases and deaths rising so rapidly that any number written would be out of date by time of publishing. Developing countries, war zones, refugee camps and those with a huge number of already immunocompromised patients such as the 25 million people in Africa living with HIV, will be decimated if the spread is not limited. Vaccines are beginning clinical trial phase and a huge global emphasis on interferon (IFN) research and drug development is underway. This will be necessary to control our unacceptable flu season fatalities and inevitable future pandemics. It is also crucial to understand that the most effective way to prevent viral zoonosis is to maintain the barriers between natural reservoirs and human society, in mind of the ‘one health’ concept. We are all interconnected, each biome, environment, climate, plant, animal, with our health and existence all deeply depend on each other.