Time in Guyana. Guyana - current local time, summer/winter time, GMT offset, time conversion dates 2017, DST. 1  Current time in Guyana. 2  Time difference to GMT/UTC. 3  Daylight Saving Time 2017 (Summer Time) 4  Get Guyana Clock for your website. 5  Get Online Html Clock for cities in Guyana.
Viruses are tiny agents that can infect a variety of living organisms, including bacteria, plants, and animals. Like other viruses, the dengue virus is a microscopic structure that can only replicate inside a host organism.
How a Virus Infects You. Viruses lie around our environment all of the time just waiting for a host cell to come along. They can enter us through the nose, mouth or breaks in the skin (see How the Immune System Works for details). Once inside, they find a host cell to infect. For example, cold and flu viruses will attack cells that line the respiratory or digestive tracts. The human immunodeficiency virus (HIV), which causes AIDS, attacks the T-cells of the immune system.