18 Jun 2022 Polio virus
Polio virus - Today Current Affairs Recently, the presence of 'Vaccine-Derived Poliovirus-VDPV' was found during 'Environmental Surveillance of Sewage Samples' in Kolkata. Most likely it has increased manifold due to lack of immunity. This is not a case of human-to-human polio transfer. VDPV is a...