variant is. and so really we may have to get vaccination numbers up very high as we do with diseases like chickenpox and measles. and the 90 to 95% coverage range. so we re really pushing for everyone to get vaccinated. so you re saying herd immunity is now going to be much tougher to reach? it has to be 90 to 95% of the population vaccinated or immune because they ve had maybe a previous infection is the other way to have the immunity as well. that s important to note. israel, we are starting to see give out third shots, a booster shot. now the united kingdom and germany are considering the same thing next month. why not start this now in the u.s.? yeah. we re not quite ready for boosters. we would really like to see as we have with this vaccine program from the beginning, fully understand how well tolerated a booster dose is.