In the Baltimore system, viruses are classified by their genetic material and replication method. ssDNA viruses, like Parvovirus 🦠, only have one strand of DNA, and they need to form a double strand before they can replicate. On the other hand, dsDNA viruses, such as Herpes Simplex Virus 😷, already have both strands of DNA, so they can replicate more easily. This classification not only helps scientists understand how these viruses replicate but also why different viruses require different treatments. 🧬💉