In collaboration with researchers at the Institute of Tropical Medicine and Global Health (IMSTAG) in the Dominican Republic, the Universidad Central del Caribe (UCC) in Puerto Rico, and the U.S. Virgin Islands Department of Health, we are supporting surveillance in parts of the Caribbean for emerging SARS-CoV-2 variants and substitutions of therapeutic or public health concern. See the World Health Organization webpage on variants for more information.


SARS-CoV-2 Variants in the Caribbean

Pango LineageWHO LabelCategoryCases sequenced in last 4 weeks from Puerto Rico, N (%)Cases sequenced in last 4 weeks from the U.S. Virgin Islands, N (%)
B.1.1.7AlphaVariant of concern0 (0%)1 (10.0%)
B.1.351BetaVariant of concern0 (0%)0 (0%)
P.1GammaVariant of concern1 (0.9%)0 (0%)
B.1.617.2DeltaVariant of concern112 (97.4%)9 (90.0%)
B.1.429 / B.1.427EpsilonVariant of interest0 (0%)0 (0%)
B.1.525EtaVariant of interest0 (0%)0 (0%)
B.1.526IotaVariant of interest0 (0%)0 (0%)
B.1.617.1KappaVariant of interest0 (0%)0 (0%)
B.1.621/B.1.621.1NoneNone0 (0%)0 (0%)
Non-VOC/VOINANone2 (1.7%)0 (0%)

Table 1. Number and percent of sequenced cases per variant in the Dominican Republic, U.S. Virgin Islands, and Puerto Rico. Numbers represent only cases sequenced at the Yale SARS-CoV-2 Genomic Surveillance Initiative from our partners on these islands and are not necessarily comprehensive or representative.

SARS-CoV-2 Sequencing in the Caribbean

Figure 1. All available sequences from the Caribbean. This includes both data sequenced by the Yale SARS-CoV-2 Genomic Surveillance Initiative and sequences available on GISAID. The size of each circle is proportional to the number of sequences available. The full tree and map, including all available sequences from GISAID, can be found here.

Puerto Rico

Figure 2A. SARS-CoV-2 Sequencing in Puerto Rico

Figure 2B. Frequency of variants in Puerto Rico since January 1, 2021

U.S. Virgin Islands

Figure 3A. SARS-CoV-2 Sequencing in the US Virgin Islands

Figure 3B. Frequency of variants in the US Virgin Islands since January 1, 2021