Study: NCT04563273

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 1（0.025mg/0.1ml/person）
Description: Intradermal injection of 0.025mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 1（0.025mg/0.1ml/person）
Description: Intradermal injection of 0.025mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 1（0.025mg/0.1ml/person）
Description: Intradermal injection of 0.025mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 1（0.025mg/0.1ml/person）
Description: Intradermal injection of 0.025mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 2 （0.05mg/0.1ml/person）
Description: Intradermal injection of 0.05mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 2 （0.05mg/0.1ml/person）
Description: Intradermal injection of 0.05mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 2 （0.05mg/0.1ml/person）
Description: Intradermal injection of 0.05mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 2 （0.05mg/0.1ml/person）
Description: Intradermal injection of 0.05mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 3（0.075mg/0.1ml/person）
Description: Intradermal injection of 0.075mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 3（0.075mg/0.1ml/person）
Description: Intradermal injection of 0.075mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 3（0.075mg/0.1ml/person）
Description: Intradermal injection of 0.075mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 3（0.075mg/0.1ml/person）
Description: Intradermal injection of 0.075mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 4 （0.075mg/0.1ml/person）
Description: Intradermal injection of 0.075mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 4 （0.075mg/0.1ml/person）
Description: Intradermal injection of 0.075mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 4 （0.075mg/0.1ml/person）
Description: Intradermal injection of 0.075mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: BCG vaccine 4 （0.075mg/0.1ml/person）
Description: Intradermal injection of 0.075mg/0.1ml/person dose BCG.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Placebo of BCG vaccine （0.1ml/person）
Description: Intradermal injection of 0.1ml/person dose Placebo.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Placebo of BCG vaccine （0.1ml/person）
Description: Intradermal injection of 0.1ml/person dose Placebo.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Placebo of BCG vaccine （0.1ml/person）
Description: Intradermal injection of 0.1ml/person dose Placebo.

Intervention type: BIOLOGICAL
Group type: EXPERIMENTAL
Intervention: Placebo of BCG vaccine （0.1ml/person）
Description: Intradermal injection of 0.1ml/person dose Placebo.