And for my money, the best show in TV's greatest decade was Lost in Space. It's impossible to describe what watching this show was like in the 1960s. It's an experience that simply can't be re-produced today.
The reaction reaches its peak about 48 to 72 hours after the PPD is injected. Waiting too long or not long enough may cause an underestimation of the reaction and, therefore, affect how the test is read.A positive test will cause redness, itching and a raised, hardened area of skin called an induration.
If you're interested in rapid tests, your best bet is an STD clinic. You can call in advance to ask what rapid testing is available. Without rapid testing, STD test results may come back anywhere between 48 hours and two weeks. That's why you don't want to just ask how soon your STD test results will come back. It's also a good idea to ask your doctor whether they'll call with any results or only positive results.