![One dose of Pfizer's COVID-19 vaccine offers some protection. But experts say you still need the second shot - The Boston Globe One dose of Pfizer's COVID-19 vaccine offers some protection. But experts say you still need the second shot - The Boston Globe](http://thumbor-prod-us-east-1.photo.aws.arc.pub/hldm9KMIJQfFJi3WPZyf1WJYwPQ=/arc-anglerfish-arc2-prod-bostonglobe/public/PO465KMGWAQQVYHUEHT2XNIAOQ.jpg)
One dose of Pfizer's COVID-19 vaccine offers some protection. But experts say you still need the second shot - The Boston Globe
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![Antibodies in breast milk provide extra benefit to babies; vaccine protection varies among immunocompromised | Reuters Antibodies in breast milk provide extra benefit to babies; vaccine protection varies among immunocompromised | Reuters](https://cloudfront-us-east-2.images.arcpublishing.com/reuters/YZRER5AJXNO33LMBJLPUWBPKH4.jpg)
Antibodies in breast milk provide extra benefit to babies; vaccine protection varies among immunocompromised | Reuters
![A single-shot adenoviral vaccine provides hemagglutinin stalk-mediated protection against heterosubtypic influenza challenge in mice: Molecular Therapy A single-shot adenoviral vaccine provides hemagglutinin stalk-mediated protection against heterosubtypic influenza challenge in mice: Molecular Therapy](https://els-jbs-prod-cdn.jbs.elsevierhealth.com/cms/attachment/b6cfc3a3-3dcd-454a-b898-1fb948d5d3a0/fx1_lrg.jpg)
A single-shot adenoviral vaccine provides hemagglutinin stalk-mediated protection against heterosubtypic influenza challenge in mice: Molecular Therapy
![J&J COVID-19 vaccine shot loses antibody protection against omicron in study | Honolulu Star-Advertiser J&J COVID-19 vaccine shot loses antibody protection against omicron in study | Honolulu Star-Advertiser](https://www.staradvertiser.com/wp-content/uploads/2021/12/web1_web1-jandj-vaccine.jpg)
J&J COVID-19 vaccine shot loses antibody protection against omicron in study | Honolulu Star-Advertiser
![CDC on Twitter: "#COVID19 vaccine protection lessens over time. Get your COVID-19 booster to increase your protection from COVID-19, including the #Omicron variant. Find your booster: https://t.co/xbvNiaVJKV. https://t.co/Mfd801y4OB" / Twitter CDC on Twitter: "#COVID19 vaccine protection lessens over time. Get your COVID-19 booster to increase your protection from COVID-19, including the #Omicron variant. Find your booster: https://t.co/xbvNiaVJKV. https://t.co/Mfd801y4OB" / Twitter](https://pbs.twimg.com/media/FIRe88GWUAUjzCx.jpg:large)
CDC on Twitter: "#COVID19 vaccine protection lessens over time. Get your COVID-19 booster to increase your protection from COVID-19, including the #Omicron variant. Find your booster: https://t.co/xbvNiaVJKV. https://t.co/Mfd801y4OB" / Twitter
![What is booster shot; can it help protect against XE variant? Experts answer FAQs | Health - Hindustan Times What is booster shot; can it help protect against XE variant? Experts answer FAQs | Health - Hindustan Times](https://images.hindustantimes.com/img/2022/04/12/550x309/booster_dose_thumb_1649772158034_1649772173090.jpg)
What is booster shot; can it help protect against XE variant? Experts answer FAQs | Health - Hindustan Times
![CDC on Twitter: "#COVID19 vaccine protection lessens over time. Get your COVID-19 booster to increase your protection from COVID-19, including the #Omicron variant. Find your booster: https://t.co/xbvNiaVJKV. https://t.co/7HOSPKMHYr" / Twitter CDC on Twitter: "#COVID19 vaccine protection lessens over time. Get your COVID-19 booster to increase your protection from COVID-19, including the #Omicron variant. Find your booster: https://t.co/xbvNiaVJKV. https://t.co/7HOSPKMHYr" / Twitter](https://pbs.twimg.com/media/FJehFeUWQAceTxH.jpg:large)
CDC on Twitter: "#COVID19 vaccine protection lessens over time. Get your COVID-19 booster to increase your protection from COVID-19, including the #Omicron variant. Find your booster: https://t.co/xbvNiaVJKV. https://t.co/7HOSPKMHYr" / Twitter
![This gives hope': A third COVID-19 vaccine dose can boost protection for organ transplant recipients | Science | AAAS This gives hope': A third COVID-19 vaccine dose can boost protection for organ transplant recipients | Science | AAAS](https://www.science.org/do/10.1126/science.abj9828/abs/Third_vax_1280x720.jpg)