Physicists investigate why matter and antimatter are not mirror images - Does antimatter fall up, or fall down?
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Here's a news article about an HIV vaccine being tested on humans "in the field": Scientists hopeful as HIV vaccine candidate passes key test
Here's the scientific report: Evaluation of a mosaic HIV-1 vaccine in a multicentre, randomised, double-blind, placebo-controlled, phase 1/2a clinical trial (APPROACH) and in rhesus monkeys (NHP 13-19)