Sadly, it hasn't worked well for me. With my first vaccination on 21st December I was given an appointment for a second jab 21 days later in keeping with the manufacturer's requirements. This was subsequently cancelled by phone at short notice (unlawfully, as I'd consented to treatment involving two vaccines 21 days apart) and replaced with an assurance that I would receive another jab within 3 months. In recent communications from my medical centre this has now become "approximately 12 weeks". Finally, an invitation has arrived to attend on 1st April (should this particular date worry me?), some 14 1/2 weeks after the first vaccination.