What does ‘conspiracy theorists’ mean in this context?

What does ‘conspiracy theorists’ mean in this context?

The passage below is from Jellyfish age backwards by Nicklas Brendborg.

Today, we know that about twenty per cent of all cancer cases in humans are caused by microbes. In addition to the many viruses, there are also carcinogenic bacteria, such as our old acquaintance Helicobacter pylori, which can cause cancer in the stomach, and Chlamydia trachomatis (yes, this time the sexually transmitted disease), which can contribute to cervical cancer alongside HPV. Of all of these, though, HPV is the worst. To be clear, not all HPV viruses are dangerous. There are more than 170 kinds, and most problems arise from the ones called HPV16 and HPV18, which are cancer-causing. The two alone account for about five per cent of all cancers in the entire world. The majority of these cases are cervical cancers in women, but we are also seeing an increasing number of men with HPV-caused cancer, including in the oral cavity. This will hopefully be a thing of the past someday, as we have vaccines that can prevent HPV infection (although conspiracy theorists are currently working hard to do the virus’s bidding).

This passage tries to say microbes including viruses and bacteria cause cancer. But in case of HPV-caused cancer, since we have vaccines for HPV infection we would successfully prevent it in the near future.

And then out comes the phrase with the parenthesis. Literally it’s not hard to understand that sentence. That is, conspiracy theorists are currently working hard to do what the viruses order them to do.

But I cannot figure out what ‘conspiracy theorists’ seems to mean in this context.

What role does ‘conspiracy theorists (=people who believes in the idea that an event or situation is the result of a secret plan made by powerful people)’ play in this context?

And what does it intend to mean saying ‘(although conspiracy theorists are currently working hard to do the virus’s bidding)’?

Thanks in advence.