It's even worse than that.

They use HIV protein fragments in the vax.

Apparently, it's accepted methodology.

But Australia tried to make their own vax last year and had to give it up -- people were testing positive for HIV.

Excerpt from https://www.dw.com/en/australia-ends-local-covid-vaccine-trials-due-to-hiv-false-positives/a-55900847:

Australia on Friday abandoned the development of a domestically developed COVID-19 vaccine after several participants in early-stage trials returned false-positive HIV test results.

The vaccine being developed by the University of Queensland and biotech company CSL "will not be able to proceed based on the scientific advice, and that will no longer feature as part of Australia's vaccine plan," Prime Minister Scott Morrison told reporters.

The CSL said that while there were no serious adverse effects seen in the Phase 1 trial of 216 participants, data showed antibodies that had developed interfered with HIV diagnosis and led to false positives on some HIV tests.

As a result, the vaccine developer said, after consultation with the Australian government, they had decided to not proceed to phase 2 and phase 3 trials.

How did this happen?

The university's researchers included small amounts of HIV protein as a "molecular clamp" as part of the vaccine's design.

"Although the university's researchers have confirmed the protein fragment poses absolutely no health risk to people who have taken the vaccine, they have identified a partial antibody response to it among trial participants," Health Minister Greg Hunt said.

"This has the potential to interfere with some HIV screening tests that look for these antibodies - leading to a false-positive test result," he said.