You can look up reishi mushroom. It is known to lower viral load. If she can lower the viral load, she will have less potential to affect baby. Babies are born with no immune system and will take time to build up. If your baby doesn’t get vaccinated, just don’t chew food from mom and feed to baby. Avoid blood contact. And even though your baby gets it, hope not, people can leave be a long healthy life with having with healthy lifestyle. But reishi mushroom has been heavily studied and very effective in lowering hbv viral load.