Java is a programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless you have Java installed, and more are created every day.
IIS is able to impersonate the IUSR_<computername> account because the user name and password for this account are known by IIS. Before returning a page to the client, IIS checks NTFS file and directory permissions to see if the IUSR_<computername> account is allowed access to the file.
The interferon gamma release assay (IGRA) is a newer type of blood test for TB that is becoming more widely available. The IGRA may be used to help diagnose latent TB: 1  if you have a positive Mantoux test. 2  if you previously had the BCG vaccination (as the Mantoux test may not be reliable in these cases). 3  as part of your TB screening if you have just moved to the UK from a country where TB is common.