![December 09, 2018: The 49ers mascot, Sourdough Sam, fires up the crowd, during a NFL football game between the Denver Broncos and the San Francisco 49ers at the Levi's Stadium in Santa December 09, 2018: The 49ers mascot, Sourdough Sam, fires up the crowd, during a NFL football game between the Denver Broncos and the San Francisco 49ers at the Levi's Stadium in Santa](https://c8.alamy.com/comp/2ET6B56/december-09-2018-the-49ers-mascot-sourdough-sam-fires-up-the-crowd-during-a-nfl-football-game-between-the-denver-broncos-and-the-san-francisco-49ers-at-the-levis-stadium-in-santa-clara-california-valerie-shoapsphoto-by-valerie-shoapscsmsipa-usa-2ET6B56.jpg)
December 09, 2018: The 49ers mascot, Sourdough Sam, fires up the crowd, during a NFL football game between the Denver Broncos and the San Francisco 49ers at the Levi's Stadium in Santa
![A Saudi woman walks in front of the famous American jeans brand outlet A Saudi woman walks in front of the famous American jeans brand outlet](https://c8.alamy.com/comp/2CN79RP/a-saudi-woman-walks-in-front-of-the-famous-american-jeans-brand-outlet-levis-in-the-mall-of-dhahran-saudi-arabia-december-17-2018-picture-taken-december-17-2018-reutershamad-i-mohammed-2CN79RP.jpg)
A Saudi woman walks in front of the famous American jeans brand outlet " Levi's" in the Mall of Dhahran, Saudi Arabia, December 17, 2018. Picture taken December 17, 2018. REUTERS/Hamad I Mohammed
![JCM | Free Full-Text | Common Variable Immunodeficiency Associated with a De Novo IKZF1 Variant and a Low Humoral Immune Response to the SARS-CoV-2 Vaccine JCM | Free Full-Text | Common Variable Immunodeficiency Associated with a De Novo IKZF1 Variant and a Low Humoral Immune Response to the SARS-CoV-2 Vaccine](https://www.mdpi.com/jcm/jcm-11-02303/article_deploy/html/images/jcm-11-02303-g001-550.jpg)
JCM | Free Full-Text | Common Variable Immunodeficiency Associated with a De Novo IKZF1 Variant and a Low Humoral Immune Response to the SARS-CoV-2 Vaccine
![Valencia, Spain- December 13, 2018: Levi's store in the big city shopping mall Aqua. Christmas decoration. Writing in Spanish Stock Photo - Alamy Valencia, Spain- December 13, 2018: Levi's store in the big city shopping mall Aqua. Christmas decoration. Writing in Spanish Stock Photo - Alamy](https://c8.alamy.com/comp/R87B8G/valencia-spain-december-13-2018-levis-store-in-the-big-city-shopping-mall-aqua-christmas-decoration-writing-in-spanish-R87B8G.jpg)