3 ms·

Have any trials been done to determine the efficacy of just 1 shot for the double dose vaccines?

• yread 6y ago
  Not yet, but you can kinda see it from the data. For Pfizer it was 60-70 after one dose already, iirc
  • bpodgursky 6y ago
    That's only if you include all infections within the two week window between shots. If you look at the tail end (ie, after the shot has time to be effective) it seems more like 90.
    • zeku 6y ago
      The issue with this is that it's the SECOND shot that gives you your long term immunity. If you only get one shot your immunity is allegedly going to wane somewhat quickly. edit: for pfizer & moderna.
      • randomopining 6y ago
        Where did you see that part? Any reason why the 2nd one makes it last that much longer?
        • bluGill 6y ago
          That is typically how the second shot works. We don't actually know. It is possible the second shot isn't needed at all. It is possible that the first shot works for 45 days and then stops working completely. Experts doubt both of these extremes, but cannot actually say they are false because they don't know.
• GizmoSwan 6y ago
  Yes they have data for results of 1 shot of 2 shot vaccines. Moderna has 80% in single shot I believe but it degrades over time so there is a second shot. The 66% that does not degrade and can be kept in room temperature is not bad at all. Most vaccines are not 90%. Most flu vaccine don't cover all different types but they still protect people as they get some sort of immunity to major types A,B etc.