Viral meningitis: Meningitis caused by many viruses is usually contagious. However, certain viruses that are transmitted by mosquitoes are usually not spread person to person, so they are not contagious.
3] Heat transfers through the glass by conduction 4] Heat transfers from the glass to the outside air via convection. If the temperature differences are small and there are no winds or drafts, transfer of heat to/from air/glass will be by conduction.
Glass-ceramics are at least 50% crystalline after they have been heated. In some cases, the final product is more than 95% crystalline. Because glass-ceramics are more resistant to thermal shock, cookware made of this material can be transferred directly from a hot stove burner to the refrigerator without breaking.