Alexander's credentials are certainly impressive, including an undergraduate epidemiology degree from McMaster, a Master’s from Oxford University and PhD obtained from McMaster in 2015. The school describes Alexander as an expert on health-research methods. His assistant professorship at McMaster was an unpaid position given to scholars working primarily outside the university. Alexander obtained his PhD under the supervision of Dr. Gordon Guyatt, a world-renowned McMaster professor who coined the term “evidence-based medicine” — the principle that health care should be governed by the best science, not opinion. However, this does not mean that he is guided by evidence. He became a COVID-19 advisor to Trump, and an aide to Michael Caputo. He went on to publish a book touting a conspiracy theory that the CDC and others were trying to bring him down as "the COVID crisis response was a carefully crafted plan to ruin him". Media Matters has accused Alexander of "erroneous political hackery" for his attempt to cover up the COVID crisis. Alexander has shifted his focus and began to write about "gender ideology" and oppose the standards of care for trans kids. He has celebrated far-right Italian Prime Minister Georgia Meloni's anti-LGBTQ, anti-trans rhetoric. For three years ending December 2019, he also was employed by the Washington, D.C.-based Infectious Diseases Society of America as a specialist in systematic reviews