The U.S. State Department said on Monday it will boost its “Do Not Travel” guidance to about 80% of countries worldwide, citing “unprecedented risk to travelers” from the COVID-19 pandemic.

The State Department already listed 34 out of about 200 countries as "Level 4: Do Not Travel," including places like Chad, Kosovo, Kenya, Brazil, Argentina, Haiti, Mozambique, Russia and Tanzania.

"This update will result in a significant increase in the number of countries at Level 4: Do Not Travel, to approximately 80% of countries worldwide," the department said in a statement.

Getting to 80% would imply adding nearly 130 countries.

The State Department said the move does not imply a reassessment of current health situations in some countries, but rather "reflects an adjustment in the State Department's Travel Advisory system to rely more on (Centers for Disease Control and Prevention's) existing epidemiological assessments."

COVID-19 Vaccine

Frequently Asked Questions

How does a vaccine work?

A vaccine works by mimicking a natural infection. A vaccine not only induces immune response to protect people from any future COVID-19 infection, but also helps quickly build herd immunity to put an end to the pandemic. Herd immunity occurs when a sufficient percentage of a population becomes immune to a disease, making the spread of disease from person to person unlikely. The good news is that SARS-CoV-2 virus has been fairly stable, which increases the viability of a vaccine.

How many types of vaccines are there?

There are broadly four types of vaccine — one, a vaccine based on the whole virus (this could be either inactivated, or an attenuated [weakened] virus vaccine); two, a non-replicating viral vector vaccine that uses a benign virus as vector that carries the antigen of SARS-CoV; three, nucleic-acid vaccines that have genetic material like DNA and RNA of antigens like spike protein given to a person, helping human cells decode genetic material and produce the vaccine; and four, protein subunit vaccine wherein the recombinant proteins of SARS-COV-2 along with an adjuvant (booster) is given as a vaccine.

What does it take to develop a vaccine of this kind?

Vaccine development is a long, complex process. Unlike drugs that are given to people with a diseased, vaccines are given to healthy people and also vulnerable sections such as children, pregnant women and the elderly. So rigorous tests are compulsory. History says that the fastest time it took to develop a vaccine is five years, but it usually takes double or sometimes triple that time.

Show

COVID-19 impact: US to ban travel to nearly 130 countries, no timeline for ease of restrictions

The State Department already listed 34 out of about 200 countries as "Level 4: Do Not Travel," including places like Chad, Kosovo, Kenya, Brazil, Argentina, Haiti, Mozambique, Russia and Tanzania.

Related stories