Havrix is a hepatitis A vaccine. Hepatitis is a serious disease caused by a virus. Hepatitis causes inflammation of the liver, vomiting, and jaundice (yellowing of the skin or eyes). Hepatitis can lead to liver cancer, cirrhosis, or death.
The oldest plant ever to be regenerated has been grown from 32,000-year-old seedsâbeating the previous recordholder by some 30,000 years. (Related: 'Methuselah' Tree Grew From 2,000-Year-Old Seed.) 1  Imagining the Banana of the Future.  The Curious Case of the Bumblebee, the Virus and the Tomato.
Do seeds have an expiration date? A: It depends on the type of seeds and how they were stored. If your seeds were kept in a cool, dry place, there's a good chance they're still viable, but expect a lower germination rate â exactly how low depends on the species. Seed corn is best used the current year (after that germination is greatly reduced), but tomato seeds can last for more than four years if stored well.