There is no vaccine against HIV infection.

现在还没有防艾滋病病毒传染的疫苗。

《牛津词典》

There is no vaccine or medicine to prevent or treat Zika. Travelers and especially pregnant women are advised to protect themselves by avoiding mosquito bites.

目前尚没有预防或治疗寨卡病毒的疫苗或药物。旅行者，特别是孕妇应该避免被蚊虫叮咬以保护自己。

youdao

There is no vaccine to protect humans from swine flu. The seasonal influenza vaccine will likely help provide partial protection against swine H3N2, but not swine H1N1 viruses.

对人来说，季节性流感疫苗很可能只能提供部分的保护免受H3N2猪流感病毒，但对于H1N1猪流感病毒，该疫苗没有保护作用。

youdao

There is no vaccine to prevent the disease and no special drug to treat it.

VOA: special.2009.04.13

Children get diseases from a class of viruses called rotaviruses, for which we have no vaccine, and- and so no way to protect them.

儿童因轮状病毒而生病,而我们没有针对这种病毒的疫苗,所以,所以我们没有办法保护儿童

耶鲁公开课 - 生物医学工程探索课程节选

There's no company that's making smallpox vaccine anymore because there's no reason to make smallpox vaccine, because nobody would buy it, right?

没有公司还生产天花疫苗,因为没有人购买天花疫苗,因此早就没有理由继续生产它了,对吧

耶鲁公开课 - 生物医学工程探索课程节选

In comparison, Guinea worm disease is an obscure condition and has no vaccine.

CNN: Guinea worm a greater challenge than smallpox

To make matters worse, it may turn out that no vaccine will work on every strain of the AIDS virus.

FORBES: Latest Hope For An AIDS Vaccine

Hepatitis C has been described as an "approaching epidemic" - and unlike hepatitis A and B, there is no vaccine against it.

BBC: Liver drug delay condemned