These are my speculations as to the possible intended effects of a CV19 vax (and please note, most are speculations with with little to no evidence for support). However, given the controllers' intense desire/desperation to vax the entire population of this earth (under the guise of an illness with a mortality rate of significantly less than 0.1% (in those without serious comorbidities) and even then, typically only in the very aged who are already suffering from chronic illness), it would seem likely there are some as yet (publicly) undisclosed purposes of the vax project. What might such purposes be?

1. It's only reasonable to start with: to eliminate CV19 and/or other coronaviruses (such as the common cold for example) from being suffered by the earths population (and animals).
2. The present CV19 vax might only be a saline placebo with the overall aim of the operation being to breakdown the 'barrier' between the state and (access on demand to) the interior of individual's bodies.
3. Injure/damage the human body's natural ability to detox at a cellular level as a result of creating (with a vax) an antibody/immune response against exosomes produced by cells (i.e. because exosomes are claimed by some to be part of the body's detox system). While this might lessen symptoms of the seasonal flu (in the short term), if indeed the exosome theory is correct, then such a lessening of symptoms would potentially be at the expense of the body's cells innate/natural ability to detoxify themselves (especially over the longer term). The exosome theory posits that what are being considered 'viruses' are in fact an aspect of the natural functioning of cellular detoxification. I heard an interesting comment a while back, speculating that the last 'great continent' to be conquered (by the megacorporates) is the human immune system. That is, just as with many other natural things on this earth, the megacorporate's business model is to damage/'take control of', the human immune system and then 'sell it back to us' - at a 'handsome' profit!
4. Diminish human female fertility/capacity to carry a child to term. As per the novel Brave New World, the conception and gestation of babies will then presumably be confined to labs. Such would be a major 'plank' of population control and also presumably 'person' ownership.
5. Act as a mechanism/vehicle for some form of digital currency and more invasive location/activity/interaction tracking (i.e. so-called 'Mark of the Beast' technology), e.g. see here for a skin tattoo combined with a vaccination. [For ref, note that such claims are denied absolutely by the controllers.]
6. To cover for possible human/animal immune suppression due to the increase in electromagnetic radiation, which will be produced by the implementation of 5G 'satellite'/(aka helium balloon platforms) and hive networks operating in the higher Gz ranges (e.g. 60 GHz).
7. Alter human beings genetically to the degree required, so that a claim of patent based property ownership can be made upon each individuals body by megacorporations. For instance, recall the claims for compensation made by some of the GMO companies in recent years, where their GMO seeds has escaped into non-interested third party farmer's fields growing non-GMO crops.
8. Provide a 'climax event' and cover for the US in particular (and global economy in general) to be 'taken down'/reset, a.k.a. the WEF's Great Reset.
9. Breaching the ethics/morality (for those that hold to such) related to abortion and cannibalism. Even though one of the original (immortal) cell lines widely utilized in vaccine production was 'obtained' from an aborted human fetus several decades ago, there is nevertheless still a relationship between it and the current cells used for some of the process in vax production (even if the cells don't end up in the final injectable).  I heard a Catholic explaining their concern/belief, that such might be employed for the purposes of facilitating the recipient of the vaccination to maybe become 'possessed' by some dark spirit? Aborted human fetus cells are not the only concern about the vax ingredients either (species DNA wise).
10. Injure/damage the human brains ability to conceive of/connect with the divine (and/or sense of the divine). That is, damage human 'spiritual capability' and so make human beings more psychologically materialistic. Please see this video starting at the 12 minute mark. [Note that the download button is often hidden under the cookie options/accept banner.]

Some prescient quotes from Rudolf Steiner, written in the approx 1920s re point (7) above:

The whole trend goes in a direction where a way will finally be found to vaccinate bodies so that these bodies will not allow the inclination towards spiritual ideas to develop and all their lives people will believe only in the physical world they perceive with the senses. [Rudolf Steiner: Fall of the Spirits of Darkness Lecture 13 The Fallen Spririts Influence in the World, Dornach, 27, Oct. 1917.]

A longing will arise(and become)general opinion:Whatever is spiritual, whatever is of the spirit, is nonsense, is madness! Endeavours to achieve this will be made by bringing out remedies to be administered by inoculation just as inoculations have been developed as a protection against diseases, only these inoculations will influence the human body in a way that will make it refuse to give a home to the spiritual inclinations of the soul. People will be inoculated against the inclination to entertain spiritual ideas. Endeavours in this direction will be made; inoculations will be tested that already in childhood will make people lose any urge for spiritual life. [Rudolf Steiner, Lecture 3, Secret Brotherhoods and the Mystery of the Human Double: Seven Lectures.]

[page 199, 200] Steiner: I have told you that the spirits of darkness are going to inspire their human hosts, in whom they will be dwelling, to find a vaccine that will drive all inclination towards spirituality out of people’s souls when they are very young, and this will happen in a roundabout way through the living body. Today, bodies are vaccinate against one thing and another; in future, children will be vaccinated with a substance which it will certainly be possible to produce, and this will make them immune, so that they do not develop foolish inclinations connected with spiritual life ‘foolish’ here, of course, in the eyes of materialists. [Book Review 2010 by Bobby Matherne see here.]