Can vaccine booster lower the COVID-19 virus infection rate?

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Different countries or regions use different sets of vaccine boosters. We can calculate a relative protection index to indicate how efficient a country of region is with its vaccine boosters to prevent COVID-19 virus infections.

This protection index is listed below by country or region. Calculation formula and examples are provided after the list.

Data was updated at 2026-04-19 19:35:43 Paris time.

You can click the header name to sort the list. Or select 2 regions to compare them in details.

	Seq.	Region	Infections	Infection Rate	Booster Rate	Protection Index ▼
		Global	772,838,745	9.92%	25.89%	-3.64
	1	Niger	9,515	0.04%	0.00%	32.12
	2	United Republic of Tanzania	43,191	0.07%	0.00%	32.09
	3	Democratic Republic of the Congo	99,333	0.11%	0.00%	32.05
	4	Burkina Faso	22,106	0.11%	0.02%	32.03
	5	Mali	33,162	0.16%	0.00%	31.99
	6	Liberia	7,930	0.16%	0.04%	31.96
	7	Benin	28,036	0.23%	0.00%	31.93
	8	Nicaragua	16,088	0.24%	0.00%	31.92
	9	Yemen	11,945	0.04%	0.22%	31.90
	10	Eritrea	10,189	0.29%	0.00%	31.87
	11	Haiti	34,501	0.30%	0.00%	31.86
	12	Somalia	27,334	0.17%	0.18%	31.81
	13	Congo	25,213	0.46%	0.00%	31.70
	14	Burundi	54,394	0.46%	0.00%	31.70
	15	Syrian Arab Republic	57,423	0.33%	0.43%	31.40
	16	Madagascar	68,421	0.25%	0.61%	31.30
	17	Papua New Guinea	46,864	0.52%	0.42%	31.22
	18	Comoros	9,109	1.05%	0.00%	31.11
	19	Equatorial Guinea	17,130	1.22%	0.33%	30.61
	20	Djibouti	15,690	1.59%	0.00%	30.57
	21	Algeria	272,010	0.62%	1.31%	30.23
	22	Uganda	171,888	0.38%	1.67%	30.11
	23	Gabon	49,051	2.20%	0.12%	29.84
	24	Gambia	12,626	0.52%	2.22%	29.41
	25	El Salvador	201,833	3.11%	0.00%	29.05
	26	Cameroon	125,136	0.47%	3.03%	28.66
	27	Guinea	38,572	0.29%	3.24%	28.63
	28	Venezuela (Bolivarian Republic of)	552,695	1.94%	2.29%	27.92
	29	Kenya	344,094	0.64%	3.72%	27.80
	30	Guinea-Bissau	9,614	0.49%	3.88%	27.79
	31	South Sudan	18,765	0.17%	4.58%	27.41
	32	Honduras	472,743	4.77%	0.00%	27.37
	33	Senegal	89,033	0.53%	4.33%	27.30
	34	Jamaica	156,563	5.29%	0.00%	26.87
	35	Ethiopia	501,117	0.44%	5.20%	26.52
	36	Togo	39,527	0.48%	5.17%	26.51
	37	Mexico	7,702,582	5.97%	0.00%	26.19
	38	Kyrgyzstan	88,929	1.36%	4.61%	26.19
	39	Ecuador	1,066,409	6.04%	0.00%	26.10
	40	Dominican Republic	661,180	6.09%	0.00%	26.01
	41	Iraq	2,465,545	6.13%	0.68%	25.34
	42	Malawi	89,162	0.47%	6.44%	25.25
	43	Guatemala	1,250,304	6.98%	0.00%	25.06
	44	Afghanistan	229,686	0.59%	6.67%	24.91
	45	Solomon Islands	25,954	3.78%	4.06%	24.32
	46	Central African Republic	15,440	0.32%	7.58%	24.26
	47	Mozambique	233,731	0.75%	7.43%	23.98
	48	Nigeria	267,173	0.13%	8.16%	23.87
	49	Sudan	63,993	0.15%	8.87%	23.14
	50	Vanuatu	12,019	3.91%	5.39%	22.86
	51	Guyana	73,676	9.37%	0.00%	22.82
	52	Angola	106,303	0.32%	9.17%	22.66
	53	Zambia	349,304	1.90%	7.70%	22.56
	54	Mauritania	63,764	1.37%	8.26%	22.53
	55	Cuba	1,115,043	9.84%	0.00%	22.31
	56	Lesotho	35,892	1.68%	8.30%	22.19
	57	Libya	507,269	7.38%	2.72%	22.06
	58	Paraguay	736,154	10.32%	0.00%	21.84
	59	Bolivia (Plurinational State of)	1,210,433	10.37%	0.00%	21.79
	60	Cabo Verde	64,474	11.60%	0.14%	20.43
	61	Côte d’Ivoire	88,380	0.34%	11.90%	19.92
	62	Bosnia and Herzegovina	403,443	12.30%	0.00%	19.86
	63	Canada	4,743,991	12.57%	0.00%	19.66
	64	Saint Vincent and the Grenadines	9,674	8.72%	3.86%	19.61
	65	Peru	4,520,102	13.71%	0.00%	18.44
	66	South Africa	4,072,636	6.87%	7.44%	17.85
	67	Ukraine	5,520,483	12.62%	1.70%	17.83
	68	Sierra Leone	7,766	0.10%	15.07%	17.00
	69	Egypt	516,023	0.50%	14.87%	16.78
	70	Russian Federation	23,479,653	16.09%	0.00%	16.26
	71	Ghana	171,834	0.55%	15.47%	16.14
	72	Zimbabwe	265,975	1.79%	15.47%	14.90
	73	Brazil	37,519,960	17.65%	0.00%	14.41
	74	Belize	71,373	17.95%	0.00%	14.29
	75	Armenia	451,272	15.23%	2.92%	14.02
	76	Bahamas	38,084	9.68%	8.57%	13.90
	77	Namibia	172,208	6.78%	11.75%	13.63
	78	Sao Tome and Principe	6,719	3.07%	15.80%	13.33
	79	Saint Kitts and Nevis	6,607	12.42%	6.51%	13.22
	80	Antigua and Barbuda	9,106	9.30%	10.05%	12.81
	81	India	45,004,816	3.26%	16.58%	12.32
	82	occupied Palestinian territory	703,228	13.78%	6.61%	11.77
	83	Tunisia	1,153,361	9.76%	10.65%	11.75
	84	Saint Lucia	30,209	16.45%	4.28%	11.45
	85	Greenland	11,971	21.09%	0.00%	11.07
	86	Kosovo	274,279	15.27%	5.93%	10.96
	87	Eswatini	75,189	6.48%	15.47%	10.22
	88	Morocco	1,278,055	3.46%	18.65%	10.05
	89	Argentina	10,074,137	22.29%	0.00%	9.91
	90	Suriname	82,506	14.06%	8.33%	9.75
	91	Oman	399,449	7.82%	15.27%	9.06
	92	Jordan	1,746,997	17.12%	6.69%	8.35
	93	Grenada	19,693	17.50%	6.59%	8.07
	94	Panama	1,041,924	24.15%	0.00%	7.87
	95	Costa Rica	1,230,653	24.16%	0.00%	7.84
	96	North Macedonia	349,923	16.80%	7.69%	7.68
	97	Chad	7,698	0.05%	24.61%	7.50
	98	Pakistan	1,580,631	0.72%	24.06%	7.38
	99	Philippines	4,126,460	3.77%	21.73%	6.67
	100	Albania	334,090	11.61%	14.10%	6.45
	101	Anguilla	3,904	26.02%	0.00%	6.14
	102	Trinidad and Tobago	191,496	13.68%	12.49%	5.98
	103	Fiji	69,047	7.70%	19.20%	5.26
	104	Romania	3,504,870	18.13%	9.29%	4.76
	105	Dominica	16,038	22.28%	5.55%	4.67
	106	Timor-Leste	23,460	1.78%	25.80%	4.58
	107	Chile	5,325,080	27.86%	0.00%	4.49
	108	Lebanon	1,239,904	18.17%	9.67%	4.32
	109	Indonesia	6,817,154	2.49%	25.36%	4.31
	110	Republic of Moldova	628,673	15.58%	13.22%	3.38
	111	Uruguay	1,041,111	29.97%	0.00%	2.19
	112	Bermuda	18,860	30.29%	0.00%	1.87
	113	Myanmar	641,393	1.18%	29.38%	1.60
	114	Bulgaria	1,315,421	18.92%	12.18%	1.10
	115	United States of America	103,436,829	31.25%	0.00%	0.91
	116	French Guiana	98,041	32.82%	0.00%	-0.67
	117	Rwanda	133,208	1.03%	32.62%	-1.49
	118	Botswana	330,409	14.05%	21.59%	-3.48
	119	Saint Helena, Ascension and Tristan da Cunha	2,166	35.68%	0.00%	-3.52
	120	Kiribati	5,085	4.26%	31.48%	-3.58
	121	Turks and Caicos Islands	6,704	17.31%	19.22%	-4.27
	122	The United Kingdom	24,812,582	36.55%	0.00%	-4.39
	123	British Virgin Islands	7,392	24.45%	12.32%	-4.47
	124	Lao People's Democratic Republic	218,903	3.01%	33.69%	-4.54
	125	Serbia	2,583,470	37.30%	0.00%	-5.09
	126	Barbados	110,141	38.33%	0.00%	-6.15
	127	Nepal	1,003,450	3.44%	35.26%	-6.55
	128	Montserrat	1,403	28.07%	11.26%	-7.17
	129	Montenegro	251,280	40.01%	0.00%	-7.85
	130	Aruba	44,224	41.42%	0.00%	-9.26
	131	Sri Lanka	672,661	3.14%	38.39%	-9.37
	132	Colombia	6,384,551	12.55%	29.07%	-9.46
	133	Azerbaijan	834,241	8.23%	33.98%	-10.05
	134	Bangladesh	2,046,165	1.24%	41.61%	-10.70
	135	Iran (Islamic Republic of)	7,625,160	9.08%	34.02%	-10.94
	136	Kazakhstan	1,502,857	8.00%	35.43%	-11.28
	137	Thailand	4,761,226	6.82%	39.37%	-14.03
	138	Sint Maarten	11,051	25.77%	21.33%	-14.94
	139	Cayman Islands	31,472	47.89%	0.00%	-15.73
	140	Uzbekistan	174,842	0.52%	47.68%	-16.05
	141	Saudi Arabia	841,469	2.42%	46.13%	-16.39
	142	Micronesia (Federated States of)	26,547	23.08%	26.55%	-17.47
	143	Kuwait	666,551	15.61%	34.13%	-17.58
	144	Samoa	16,780	8.46%	41.46%	-17.76
	145	Poland	6,590,705	17.36%	33.29%	-18.39
	146	Guadeloupe	203,235	50.79%	0.00%	-18.64
	147	Tonga	16,888	15.98%	36.51%	-20.32
	148	Turkey	17,004,677	20.16%	32.91%	-20.91
	149	Georgia	1,855,289	46.51%	6.68%	-21.03
	150	Pitcairn Islands	4	8.00%	46.00%	-21.84
	151	Curaçao	45,883	27.96%	26.29%	-22.09
	152	Tajikistan	17,786	0.19%	54.16%	-22.18
	153	Croatia	1,279,927	31.54%	25.79%	-25.10
	154	Marshall Islands	16,138	27.26%	31.35%	-26.46
	155	American Samoa	8,359	15.14%	43.77%	-26.76
	156	Turkmenistan	0	0.00%	60.18%	-28.02
	157	Wallis and Futuna	3,550	31.57%	29.79%	-29.20
	158	Martinique	230,354	61.38%	0.00%	-29.23
	159	Hungary	2,220,168	22.73%	39.93%	-30.42
	160	United Arab Emirates	1,067,030	10.79%	51.96%	-30.59
	161	Mongolia	1,011,388	30.85%	32.30%	-30.99
	162	Sint Eustatius	1,221	38.90%	24.44%	-31.18
	163	China	99,321,637	6.75%	56.69%	-31.28
	164	New Caledonia	80,064	28.04%	36.19%	-32.08
	165	French Polynesia	78,700	28.02%	36.42%	-32.27
	166	Cambodia	138,978	0.83%	64.37%	-33.05
	167	Slovakia	1,871,209	34.28%	31.03%	-33.11
	168	Maldives	186,694	34.54%	30.95%	-33.33
	169	Malaysia	5,160,116	15.94%	50.51%	-34.22
	170	Belarus	994,037	10.52%	59.73%	-38.09
	171	Northern Mariana Islands (Commonwealth of the)	14,334	24.90%	45.38%	-38.12
	172	Viet Nam	11,624,000	11.94%	59.56%	-39.34
	173	Tuvalu	2,943	24.96%	48.72%	-41.52
	174	Mauritius	315,100	24.78%	51.46%	-43.73
	175	Tokelau	80	5.93%	71.70%	-45.47
	176	Sweden	2,738,097	26.51%	53.03%	-47.30
	177	Lithuania	1,359,230	48.65%	32.15%	-48.27
	178	Guam	52,187	30.92%	49.54%	-48.29
	179	Latvia	977,068	51.22%	29.37%	-48.42
	180	Estonia	604,950	45.52%	36.60%	-49.80
	181	Finland	1,499,712	27.14%	55.67%	-50.66
	182	Norway	1,494,968	27.85%	55.67%	-51.26
	183	Qatar	514,524	17.86%	66.12%	-51.82
	184	Czechia	4,713,739	44.08%	41.52%	-53.14
	185	Spain	13,980,340	29.54%	56.02%	-53.40
	186	Bonaire	9,864	47.16%	38.85%	-53.85
	187	Bhutan	62,697	8.13%	82.25%	-58.22
	188	Malta	120,767	23.47%	67.69%	-58.99
	189	Monaco	17,181	43.78%	48.54%	-60.12
	190	Slovenia	1,350,022	64.41%	30.68%	-62.80
	191	Ireland	1,726,402	34.78%	60.44%	-63.03
	192	Japan	33,803,572	26.73%	68.47%	-63.04
	193	Seychelles	51,220	52.08%	45.69%	-65.34
	194	Cook Islands	7,174	40.84%	58.30%	-66.98
	195	Bahrain	696,614	40.94%	59.28%	-68.06
	196	Australia	11,698,780	45.88%	56.48%	-70.04
	197	Liechtenstein	21,561	55.65%	47.26%	-70.65
	198	Netherlands	8,623,210	49.54%	53.53%	-70.89
	199	Saba	837	43.30%	60.53%	-71.67
	200	Belgium	4,836,886	41.98%	62.37%	-72.12
	201	Palau	6,249	34.54%	71.22%	-73.59
	202	Israel	4,841,772	55.94%	50.27%	-74.05
	203	New Zealand	2,434,052	50.48%	56.39%	-74.22
	204	Puerto Rico	1,252,713	43.79%	63.23%	-74.86
	205	Greece	5,494,594	51.26%	56.43%	-75.25
	206	Isle of Man	38,008	44.70%	62.72%	-75.26
	207	Switzerland	4,436,359	51.26%	57.49%	-76.47
	208	Germany	38,437,756	46.22%	62.65%	-76.71
	209	Faroe Islands	34,658	70.93%	43.56%	-82.33
	210	Andorra	48,015	62.14%	54.50%	-84.48
	211	Luxembourg	387,467	61.89%	57.10%	-86.60
	212	Italy	26,433,512	44.32%	76.09%	-88.06
	213	Denmark	3,423,176	58.79%	61.58%	-88.11
	214	France	38,997,490	59.96%	60.47%	-88.27
	215	Nauru	5,393	49.78%	71.12%	-88.74
	216	Portugal	5,634,044	54.72%	68.46%	-91.00
	217	Iceland	209,503	57.53%	67.66%	-92.98
	218	Singapore	2,827,115	48.32%	81.52%	-95.62
	219	Falkland Islands (Malvinas)	1,923	55.21%	73.01%	-96.07
	220	Cyprus	660,854	74.42%	53.88%	-96.14
	221	Austria	6,081,287	68.32%	60.21%	-96.37
	222	Jersey	66,391	61.59%	68.34%	-97.77
	223	Niue	895	55.32%	75.71%	-98.50
	224	San Marino	25,292	74.52%	57.34%	-99.23
	225	Republic of Korea	34,571,873	67.43%	65.62%	-100.90
	226	Brunei Darussalam	321,235	73.43%	77.83%	-117.42
	227	Guernsey	35,326	54.80%	107.56%	-130.19
	228	Gibraltar	20,550	61.00%	145.94%	-174.78
	Seq.	Region	Infections	Infection Rate	Booster Rate	Protection Index ▼

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Booster for Infection Protection Index Formula

Relative Protection Index = Infection Rate Difference + Vaccination Rate Difference
Infection Rate Difference = Global Infection Rate - Regional Infection Rate
Vaccination Rate Difference = Global Booster Rate - Regional Booster Rate

Example 1: Booster for Infection Protection Index in India, using 2022-12-18 WHO data.

Global Infection Rate = 8.31%
India Infection Rate = 3.24%
Global Booster Rate = 29.46%
India Booster Rate = 16.16%

Relative Protection Index = (8.31 - 3.24) + (29.46 - 16.16) = 18.37

Example 2: Booster for Infection Protection Index in USA, using 2022-12-18 WHO data.

Global Infection Rate = 8.31%
USA Infection Rate = 29.77%
Global Booster Rate = 29.46%
USA Booster Rate = 34.15%

Relative Protection Index = (8.31 - 29.77) + (29.46 - 34.15) = -26.15

Example 3: Booster for Infection Protection Index in China, using 2022-12-18 WHO data.

Global Infection Rate = 8.31%
China Infection Rate = 0.68%
Global Booster Rate = 29.46%
China Booster Rate = 54.70%

Relative Protection Index = (8.31 - 0.68) + (29.46 - 54.70) = -17.61

 

⇒ Vaccine Efficacy: Booster for Death Protection

⇐ Vaccine Efficacy: Vaccination for Death Protection

⇑ COVID-19 Virus Vaccine Efficacy

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