the one that costs 1600 contains 10 subtypes of the pneumococcal bacteria and is PCV10. the one costing 3800 contains 13 subtypes and hence PCV13. since PCV 13 contains more subtypes, the cost is more. practically speaking there isnt much of a difference between the two, but if you want the very best for your baby you can opt for PCV13. whichever one you decide is going to be continued for a total of 4 vaccinations. you cannot interchange later. you can give PCV along with Penta on the same day also or a few days later

Pcv 13 is the best available vaccine among pneumococcal vaccines interms of efficacy as it covers majority of the strain in comparison to pcv 10 And also the studies have shown Better efficacy of prevenar( pcv 13) . Yes can be given after 1 week but ideal would be together