VCS (Vaccines Cooling System) is a mobile cooling system that uses hybrid energy sources (solar and dynamo) to help with vaccine distribution in cities and rural areas. The system comprises a well-lagged cooling chamber in which vaccines are cooled.VCS (Vaccines Cooling System) is a mobile cooling system that uses hybrid energy sources (solar and dynamo) to help with vaccine distribution in cities and rural areas. The system comprises a well-lagged cooling chamber in which vaccines are cooled.