Military Infectious Disease Surveillance (1-7 January 2022)

South Korea [1-6]

On 2 January, a total of 25 new cases, including 23 breakthrough cases, were reported from the Army (12 cases), Air Force (7 cases) and Navy (6 cases). This brings the total caseload in the South Korean military to 3,303 with 271 active infections as of 2 January 2022.
On 3 January, 8 cases were reported, including 5 cases from the Army, and one case each from the Air Force and a unit under direct control of the defense ministry. Of the newly reported cases, 7 were breakthrough cases. This brings the total number of cases in the military to 3,311 cases, with 1507 breakthrough cases and 240 active cases.
On 4 January, a total of 25 new cases were reported in overseas (4 cases) and domestic (21 cases). Cases were reported from troops stationed in Lebanon (Dongmyeong unit, 2 cases) and South Sudan (Hanbit unit, 2 cases). The new domestic cases were reported from the Army (14 cases), the Air Force (4 cases), units under direct control of the defense ministry (2 cases) and the Navy (1 case). The total number of cases in the military domestically is 3,332 cases including 1,527 breakthrough cases.
On 5 January, 28 new cases were reported from the Army (14 cases), units directly under the defense ministry’s control (9 cases), Air Force (2 cases), Marine Corps (2 cases), and the Navy (1 case). A total of 25 of the new infections were breakthrough cases. This brings the total caseload in the military to 3,360 cases with 1,552 breakthrough cases.
On 6 January, 16 cases were reported, including 15 breakthrough cases, bringing the total caseload in the military to 3,376 cases. Of the new cases, 14 were breakthrough infections which brings the total number of breakthrough cases to 1,566. The new cases were reported from the Army and Air Force (6 cases each), and units under the direct command of the defense ministry (4 cases).

United States [7]

On 4 January 2022, a total of 3 cases were reported from the US Army Garrison-Kwajalein Atoll, Marshall Islands from 37 army personnel and their families under the 2-week entry quarantine.

United States Forces Japan [8-14]

Between 27 December 2021 and 3 January 2021, a total of 143 cases were reported from Marine Corps Air Station Iwakuni, of which 73 cases were reported between 31 December 2021 and 3 January 2022.
Between 27 and 28 December 2021, the Combined Arms Training Centre Camp Fuji reported 10 new infections as of 29 December 2021.
As of 2 January 2022, 234 new cases were reported from 9 U.S. Forces bases in Okinawa Prefecture. No additional details of the cases were reported, but the high number of cases follows the decision to test all military personnel and related individuals for COVID-19 within 24 hours upon entry into Japan, from 30 December 2021. As of 1 January 2022, a total of 522 new infections was reported amongst the US military in Japan in December 2021.
On 5 January 2022, 338 cases were reported across US bases in Japan. The new cases included 156 cases from the previous week, but were mainly attributed to 182 new cases reported from Marine Corps Air Station Iwakuni on 4 January 2022. In response to increased cases across the USFJ bases, all bases have increased the Health Protection Condition Level to Bravo on 5 January 2021. The latest guidelines mandates mask-wearing for all USFJ-affiliated individuals while off-base and in indoors and public areas within bases, regardless of vaccination status. The latest case updates at the following bases are as follows:
- - Marine Corps Air Station Iwakuni: The base has reported 422 cases as of 4 January 2022, since cluster initiation on 24 December 2021.
  - Combined Arms Training Center Camp Fuji: 41 cases as of 5 January, since late December 2021
  - Yokota Air base: 57 new cases reported on 5 January 2021, bringing the total caseload to 64. 30 of the new cases were returning to Japan from the U.S. and were in quarantine, 4 cases were close contacts of previous cases, and remaining 23 cases were identified by the base public health authorities.
  - Naval Air Facility Atsugi: 69 new cases reported on 5 January 2021, of which 42 recently arrived in Japan, 18 were symptomatic, 4 were close contacts, and 5 cases pending investigation on their source of infection.
  - U.S Army Japan: 14 new cases reported between 29 December 2021 and 5 January 2022. Of the new cases. 7 were recent arrivals to Japan, 4 were close contacts and 3 were symptomatic.
  - Sasebo Naval Base: 17 cases as of 4 January 2021, of which 16 cases were reported since 28 December 2021. Of the active cases, 11 were symptomatic and the remaining were detected during medical screening
  - Okinawa bases: 6 cases were reported at Kadena Air Base (2 cases) , Marine’s Camp Foster (1 case) and unspecified locations (3 cases) on 5 January 2022.
As of 6 January 2022, a total of 1,784 active cases were reported across 18 US bases through Japan. New cases were reported from Marine Corps Air Station Iwakuni (115 new cases) and the US bases in Okinawa (162 cases) on 6 January 2022. The high active case numbers are mainly attributed to those from Marine Corps Air Station Iwakuni (529 cases), Camp Hansen (282 cases) and Yokosuka Naval Base (213 cases) as of 6 January 2022.

United States Forces Korea[15]

Between 27 December 2021 and 3 January 2021, a total of 682 cases were reported from US bases in South Korea, the highest weekly count ever reported by USFK. The previous peak was 467 cases reported between 21 December and 27 December 2021. Of the 682 new cases, all but one case were domestic cases, with the last case being a new arrival to South Korea.

Colombia [16]

A chagas disease outbreak has been reported at a military base in Cesar, northern Columbia. An unspecified number of soldiers were infected, with 2 deaths and 7 ICU admissions. The infections have been linked to the consumption of food.

Sources:

Military Infectious Disease Surveillance (1-7 January 2022)

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