Does she know that all vaccines for this virus are what is termed as 'leaky'. It means that the vaccine will NOT prevent you from getting the virus. This is even according to the data from the vaccine manufacturers. This vaccines are at best only supposed to allow you to more easily pass the virus (assuming they even do what they say).

In addition, since she is a woman and I assume relatively young, she would already have little issue passing this virus. The vast majority of the people that have serious issues with this virus are men. I hear stories of women in their 80s passing this virus with symptoms that are actually less sever than a typical flu was for them.

Basically:

• If she is getting the vaccine to protect the people around her from this virus: It won't work. This vaccine will not prevent her from catching or spreading the virus. If anything, she might be more likely to be asymptomatic and potentially allow her to walk around and spread this virus without knowing it. If she at least got some symptoms (would likely be very minor for her anyways although she might still be asymptomatic but nothing you can do about that), she might be able to notice and be able avoid people as not to infect them until she cleared the virus.

• If she is getting the vaccine to protect herself: It is redundant at best. At worst, she is putting herself at risk from the vaccine which is a far greater risk to her than this virus, especially given her demographic (relatively young woman).