Which Covid-19 vaccines cause blood clots in the brain and which vaccines are effective against the 'Double Mutant' mutation of Covid-19?

COVID-19 has inundated our lives with the waves of attacks, from the 1st wave to the 3rd and perhaps even the fourth. Vaccines were prepared after the infection caused by the Covid-19 virus to tame the infection and create herd immunity quickly. A couple of vaccines have been found to cause blood clots in the brain, which is more dangerous than not taking the vaccination. A couple other vaccines have logistical requirements to sustain efficacy till injected. In some parts these logistics are very difficult to create and sustain. In the meantime, the virus RNA has mutated creating different strains in several countries across the globe. In one case, the virus had become more deadly by mutating into a 'Double Mutant' RNA. Which vaccine can protect us against this more dangerous variant of Covid-19?