
Explore what viruses are, how they function and are named. Learn why some cause disease through genomes, genes, and proteins, and study host interactions, vaccination, and five virus stories.
Discover why viruses are the most abundant life form as obligate cellular parasites, with genomes, capsids, and sometimes envelopes, and how they enter cells to replicate and cause infection.
Explore how viruses carry DNA or RNA genomes—single- and double-stranded, linear or circular, segmented—and how Baltimore classification and reverse transcriptase shape replication and disease.
Explore how virus genomes vary in size and gene content, how genes overlap, and how viral proteins—capsid, envelope, and polymerase—rely on host transcription and translation to drive infection.
Explore how viruses are classified and named by ICTV using taxonomy, phylogeny, and genome analysis, with examples from SARS-CoV-2 and clear naming guidelines.
Explore the infection process, from virus entry via receptors and target cells to replication, protein production, and exit, including routes through skin, eyes, nose, and mouth.
Explores how mammals defend against viruses with non-immune and immune defenses, and how vaccines activate innate and adaptive immunity to build memory.
Explore how viruses affect populations and learn key epidemiological metrics—incubation period, generation time, infectious period, and the basic reproductive number—along with herd immunity and vaccination.
Explore how most viruses are harmless pathogens and only a small fraction cause disease through acute, chronic, and latent infections, cancers, and learn how antivirals and vaccines mitigate these effects.
Welcome to the basic virology course!
During this course, you will learn what viruses are, what do they do, why they are important, and that most of them are not bad! I have divided this course into ten lectures:
Introduction to viruses
Basic molecular biology
Virus genomes
Virus genes and proteins
Virus classification and nomenclature
Virus infection
Host defences against virus infection
Virus epidemiology and vaccination
Viruses and disease
Selected virus stories
During the lectures, you will get to know many animal viruses (such as SARS-CoV-2, flu viruses, Measles virus, and Rabies virus), giant viruses of amoebas, bacterial viruses (phages), and plant and fungal viruses. You will learn how viruses make you sick, what is herd immunity, how virus tests work, and what is in virus vaccines. Simultaneously, as you learn about viruses, you will learn some molecular- and cell biology.
Learning objectives
At the end of this course, you will have a good knowledge of viruses. You should be able to understand all news and basic scientific information about viruses. You should be able to make rational decisions on how to protect yourself and others against viruses.
Teacher
I have PhD in virology. I have studied viruses for 20 years and published 15 scientific articles on viruses and more on molecular and cellular biology. I have taught general virology and virus genetics at university. More importantly, I think that viruses are the most exciting things ever: they are elegant and effective. See it for yourself!