Research can definitely be of help in calming down fears over virus outbreaks. For example, coronaviruses are what is known as an enveloped virus.
An enveloped virus is a virus with a lipid coating that allows the virus to quickly bind to organisms, leading to infection, but the coating is also very fragile and easy to destroy.
Once that coating is destroyed, either through heat or disinfectants (even soap is generally enough to destroy it), the virus quickly dries out and becomes inactive, unable to infect or cause illness.

I could go into more detail and link page after page of information, but suffice to say that the chances of any virus particles being on your parcel, let alone 2019-nCoV ones, is virtually nil.
If you still want that extra peace of mind you can by all means follow the steps outlined in my previous post, just a few hours of direct sunlight on a 30°C day will destroy most any nasties.

Disclaimer time: I'm also no expert, I'm not a trained medical professional, but I have done my research on more than a few medical topics, both for peace of mind and to be better able to handle situations that have arisen.
If you are still concerned by all means go speak to a doctor, but in all likelihood they will say much of the same, that unless you have contact with an infected individual it's unlikely that you're at any risk.

Take it from me, we can definitely be our own worst enemies in these situations.