If a woman is vaccinated against COVID-19, she does not need to take any special precautions when feeding her baby at the breast or expressing milk. However, if she has symptoms of COVID-19 or has had close contact with someone who has the illness, WHO recommends that she:

• wash hands frequently with soap and water or use alcohol-based hand rub and especially before touching the baby;
• wear a medical mask during any contact with the baby, including while feeding;
• sneeze or cough into a tissue, then dispose of it immediately and wash hands again;
• routinely clean and disinfect surfaces that others have touched.

It is important to replace medical masks as soon as they become damp and dispose of them immediately. Masks should not be reused or touched in the front.

Coronavirus disease (COVID-19): Breastfeeding (who.int):

https://www.who.int/news-room/questions-and-answers/item/coronavirus-disease-covid-19-breastfeeding