One of the blogs I keep an eye on is erv, Endogenous RetroViruses, by Abbie Smith. Not the usual language you'll see here (some over PG-13), and certainly different style (Abbie doesn't believe in the ', for instance). But for some discussion of biology, particular parts involving viruses and especially endogenous retroviruses (surprise), it's a good place to go.
I'll note that back when I was thinking about blogging, Abbie was one of the people who gave me some ideas on approach.
Some articles to take a look at for a sample of the blog:
What is normal, and how it matters in examining bees
Open Access Publishing -- and some limits
How immunization works
Antivaccinationism and death by measles
AIDS and CD4+ T-cells
Blood groups and viruses
Antibodies and dengue
Pursuing science and results
Zinc and the common cold
The Timetree of life
Scientists being slandered
Scientists and media