49ers put Kendrick Bourne back on COVID list, days after he had been cleared
Trent Williams - Wikipedia
San Francisco 49ers cornerback K'Waun Williams has 2-game suspension rescinded - ESPN
Coronavirus: San Francisco 49ers put Brandon Aiyuk, Trent Williams on Covid-19 list after Kendrick Bourne positive test, NFL News
AP source: NFL probe 49ers for possible COVID violations
San Francisco 49ers shut down facility, place Williams, Samuel and Aiyuk on COVID-19 list - Sports Illustrated
Trent Williams, Brandon Aiyuk Back On 49ers' Reserve/COVID-19 List
49ers WR Brandon Aiyuk is earning respect and focus from opponents, Sports
Packers-49ers 'TNF' matchup set to be played with no additional positive COVID-19 tests
UPDATE: 49ers To Face Packers Without Trent Williams, Brandon Aiyuk After Kendrick Bourne Positive COVID-19 Case - CBS San Francisco
49ers place Aiyuk, Williams and Helm on reserve/COVID-19 list