Hi all. Please help. I took a HIV test in Dec 2015 at a NHS walk in service in the UK. Was negative. However just reading that there are different types and strains of HIV. Now concerned my test did not test for all possible strains. I have no idea what type of test was taken, only that my blood was taken from my arm and sent off. Really worried about the possibility I was not tested for all strains. Please advise. Thank you.