You could travel to Vietnam in December if you are vaccinated

Vietnam has decided to welcome its key tourist destinations for vaccinated tourists from December onwards. These attractions will be open for those tourists who are citizens of countries that are deemed a low COVID-19 risk. The government announced on Wednesday that the country is aiming to reopen completely from June, 2022.
Vietnam is one of Asia's most sought-after tourist destinations, with unique experiences to offer. Hence, it is quite heavily depended on tourism. The country quite popular for its street food, and picturesque islands. Vietnam also happens to be one of the more favoured backpacking destinations in Asia, and there is so much you can do here, if you can plan it all beforehand. The country, like most other countries, went under full lockdown, and imposed border controls at the outbreak of the pandemic last year.

According to recent announcements made in Vietnam, the country is reopening Phu Quoc Island for vaccinated tourists from November onwards, and from December it will reopen its UNESCO World Heritage Sites. These include, Nha Trang beach, Halong Bay, Hoi An, and Dalat.
The official statement said, "We are only open when it's truly safe. We are moving step by step, cautiously but flexibly to adapt to real situations of the pandemic."

While 2019 saw a total of 18 million foreign visitors in the country, last year the country only got 3.8 million foreign visitors.