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@DirOPSPAHO To benefit from the collective immunity of vaccines coverage must be very high. 🌎 More than 700 millio… twitter.com/i/web/status/1…
@DirOPSPAHO To benefit from the collective immunity of vaccines coverage must be very high.
🌎 More than 700 millio… twitter.com/i/web/status/1…