The prescense of faster-spreading variants and transmissible mutations bring fears that the current vaccines, which are hope for billions across the world may not work as well. Since the newer variants are considered to be more transmissible, the vaccines may or may not be potentially effective against them. However, this is something we can only wait to find out.
Research on the prescense of variants, COVID vaccines efficacy rates is still underway. The Centres for Disease Control and Prevention (CDC) has also observed that the South African variant contains a specific genetic sequence, which could allow it to elude the antibodies produced in the body through vaccines, indicating that the vaccines may be somehow less effective than before.
The only thing we can do is to not be precarious in our approach and follow all norms and safety checks. This is not the time to be diligent, or take the mask off either (even if you have been vaccinated)